PlotAreaConverter::mbSingleSeriesTitle is apparently read uninitialized

...in code newly introduced in 135ce25
"tdf#146487 Don't show generic diagram title when there is an empty title
given", which caused CppunitTest_chart2_export2 to fail with

> /oox/inc/drawingml/chart/plotareaconverter.hxx:78:62: runtime error: load of value 222, which is not a valid value for type 'bool'
>     #0 0x7f95cd9ed87c in oox::drawingml::chart::PlotAreaConverter::isSingleSeriesTitle() const /oox/inc/drawingml/chart/plotareaconverter.hxx:78:62
>     #1 0x7f95cd9e506f in oox::drawingml::chart::ChartSpaceConverter::convertFromModel(com::sun::star::uno::Reference<com::sun::star::drawing::XShapes> const&, com::sun::star::awt::Point const&) /oox/source/drawingml/chart/chartspaceconverter.cxx:189:53
>     #2 0x7f95cd9b6c34 in oox::drawingml::chart::ChartConverter::convertFromModel(oox::core::XmlFilterBase&, oox::drawingml::chart::ChartSpaceModel&, com::sun::star::uno::Reference<com::sun::star::chart2::XChartDocument> const&, com::sun::star::uno::Reference<com::sun::star::drawing::XShapes> const&, com::sun::star::awt::Point const&, com::sun::star::awt::Size const&) /oox/source/drawingml/chart/chartconverter.cxx:93:20
>     #3 0x7f95ce548f59 in oox::drawingml::Shape::finalizeXShape(oox::core::XmlFilterBase&, com::sun::star::uno::Reference<com::sun::star::drawing::XShapes> const&) /oox/source/drawingml/shape.cxx:2245:50
>     #4 0x7f95438150b2 in oox::xls::Shape::finalizeXShape(oox::core::XmlFilterBase&, com::sun::star::uno::Reference<com::sun::star::drawing::XShapes> const&) /sc/source/filter/oox/drawingfragment.cxx:113:30
>     #5 0x7f95ce5267bb in oox::drawingml::Shape::createAndInsert(oox::core::XmlFilterBase&, rtl::OUString const&, oox::drawingml::Theme const*, com::sun::star::uno::Reference<com::sun::star::drawing::XShapes> const&, bool, bool, basegfx::B2DHomMatrix&, oox::drawingml::FillProperties const&, std::shared_ptr<oox::drawingml::Shape>) /oox/source/drawingml/shape.cxx:1964:9
>     #6 0x7f95ce4edb54 in oox::drawingml::Shape::addShape(oox::core::XmlFilterBase&, oox::drawingml::Theme const*, com::sun::star::uno::Reference<com::sun::star::drawing::XShapes> const&, basegfx::B2DHomMatrix const&, oox::drawingml::FillProperties const&, std::__debug::map<rtl::OUString, std::shared_ptr<oox::drawingml::Shape>, std::less<rtl::OUString>, std::allocator<std::pair<rtl::OUString const, std::shared_ptr<oox::drawingml::Shape> > > >*, std::shared_ptr<oox::drawingml::Shape>) /oox/source/drawingml/shape.cxx:366:41
>     #7 0x7f954381ef79 in oox::xls::DrawingFragment::onEndElement() /sc/source/filter/oox/drawingfragment.cxx:335:30
>     #8 0x7f95cdcaee54 in oox::core::ContextHandler2Helper::implEndElement(int) /oox/source/core/contexthandler2.cxx:125:9
>     #9 0x7f95cdd5c116 in oox::core::FragmentHandler2::endFastElement(int) /oox/source/core/fragmenthandler2.cxx:91:5
>     #10 0x7f95caf68fca in (anonymous namespace)::Entity::endElement() /sax/source/fastparser/fastparser.cxx:514:27
>     #11 0x7f95caf68998 in sax_fastparser::FastSaxParserImpl::callbackEndElement() /sax/source/fastparser/fastparser.cxx:1331:17
>     #12 0x7f95caf58444 in (anonymous namespace)::call_callbackEndElement(void*, unsigned char const*, unsigned char const*, unsigned char const*) /sax/source/fastparser/fastparser.cxx:338:18
>     #13 0x7f960adebeda in xmlParseEndTag2 /workdir/UnpackedTarball/libxml2/parser.c:10090:2
>     #14 0x7f960ad929b5 in xmlParseTryOrFinish /workdir/UnpackedTarball/libxml2/parser.c:11868:14
>     #15 0x7f960ad86334 in xmlParseChunk /workdir/UnpackedTarball/libxml2/parser.c:12151:5
>     #16 0x7f95caf53231 in sax_fastparser::FastSaxParserImpl::parse() /sax/source/fastparser/fastparser.cxx:1085:21
>     #17 0x7f95caf4cd18 in sax_fastparser::FastSaxParserImpl::parseStream(com::sun::star::xml::sax::InputSource const&) /sax/source/fastparser/fastparser.cxx:890:9
>     #18 0x7f95caf6e950 in sax_fastparser::FastSaxParser::parseStream(com::sun::star::xml::sax::InputSource const&) /sax/source/fastparser/fastparser.cxx:1470:13
>     #19 0x7f95cdce50d1 in oox::core::FastParser::parseStream(com::sun::star::xml::sax::InputSource const&, bool) /oox/source/core/fastparser.cxx:121:15
>     #20 0x7f95cdce5868 in oox::core::FastParser::parseStream(com::sun::star::uno::Reference<com::sun::star::io::XInputStream> const&, rtl::OUString const&) /oox/source/core/fastparser.cxx:129:5
>     #21 0x7f95cddbb234 in oox::core::XmlFilterBase::importFragment(rtl::Reference<oox::core::FragmentHandler> const&, oox::core::FastParser&) /oox/source/core/xmlfilterbase.cxx:414:21
>     #22 0x7f95cddb9b8d in oox::core::XmlFilterBase::importFragment(rtl::Reference<oox::core::FragmentHandler> const&) /oox/source/core/xmlfilterbase.cxx:344:12
>     #23 0x7f95441ceaa8 in oox::xls::WorkbookHelper::importOoxFragment(rtl::Reference<oox::core::FragmentHandler> const&) /sc/source/filter/oox/workbookhelper.cxx:1046:27
>     #24 0x7f95442797f1 in oox::xls::WorksheetGlobals::finalizeDrawings() /sc/source/filter/oox/worksheethelper.cxx:1373:9
>     #25 0x7f95442789e0 in oox::xls::WorksheetGlobals::finalizeDrawingImport() /sc/source/filter/oox/worksheethelper.cxx:996:5
>     #26 0x7f954428744d in oox::xls::WorksheetHelper::finalizeDrawingImport() /sc/source/filter/oox/worksheethelper.cxx:1637:17
>     #27 0x7f95441771de in oox::xls::WorkbookFragment::finalizeImport() /sc/source/filter/oox/workbookfragment.cxx:511:18
>     #28 0x7f95cdd5b3ae in oox::core::FragmentHandler2::endDocument() /oox/source/core/fragmenthandler2.cxx:53:5
>     #29 0x7f95caf4cfc2 in sax_fastparser::FastSaxParserImpl::parseStream(com::sun::star::xml::sax::InputSource const&) /sax/source/fastparser/fastparser.cxx:896:36
>     #30 0x7f95caf6e950 in sax_fastparser::FastSaxParser::parseStream(com::sun::star::xml::sax::InputSource const&) /sax/source/fastparser/fastparser.cxx:1470:13
>     #31 0x7f95cdce50d1 in oox::core::FastParser::parseStream(com::sun::star::xml::sax::InputSource const&, bool) /oox/source/core/fastparser.cxx:121:15
>     #32 0x7f95cdce5868 in oox::core::FastParser::parseStream(com::sun::star::uno::Reference<com::sun::star::io::XInputStream> const&, rtl::OUString const&) /oox/source/core/fastparser.cxx:129:5
>     #33 0x7f95cddbb234 in oox::core::XmlFilterBase::importFragment(rtl::Reference<oox::core::FragmentHandler> const&, oox::core::FastParser&) /oox/source/core/xmlfilterbase.cxx:414:21
>     #34 0x7f95cddb9b8d in oox::core::XmlFilterBase::importFragment(rtl::Reference<oox::core::FragmentHandler> const&) /oox/source/core/xmlfilterbase.cxx:344:12
>     #35 0x7f95435c4daa in oox::xls::ExcelFilter::importDocument() /sc/source/filter/oox/excelfilter.cxx:113:25
>     #36 0x7f95cdcf953b in oox::core::FilterBase::filter(com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) /oox/source/core/filterbase.cxx:488:49
>     #37 0x7f95435c7733 in oox::xls::ExcelFilter::filter(com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) /sc/source/filter/oox/excelfilter.cxx:176:25
>     #38 0x7f95857c5b40 in SfxObjectShell::ImportFrom(SfxMedium&, com::sun::star::uno::Reference<com::sun::star::text::XTextRange> const&) /sfx2/source/doc/objstor.cxx:2393:34
>     #39 0x7f9585781c6a in SfxObjectShell::DoLoad(SfxMedium*) /sfx2/source/doc/objstor.cxx:761:23
>     #40 0x7f95859a9652 in SfxBaseModel::load(com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) /sfx2/source/doc/sfxbasemodel.cxx:1980:36
>     #41 0x7f95862145e9 in (anonymous namespace)::SfxFrameLoader_Impl::load(com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&, com::sun::star::uno::Reference<com::sun::star::frame::XFrame> const&) /sfx2/source/view/frmload.cxx:720:28
>     #42 0x7f95536a9900 in framework::LoadEnv::impl_loadContent() /framework/source/loadenv/loadenv.cxx:1176:37
>     #43 0x7f95536a091b in framework::LoadEnv::start() /framework/source/loadenv/loadenv.cxx:412:20
>     #44 0x7f9553698f59 in framework::LoadEnv::startLoading(rtl::OUString const&, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&, com::sun::star::uno::Reference<com::sun::star::frame::XFrame> const&, rtl::OUString const&, int, LoadEnvFeatures) /framework/source/loadenv/loadenv.cxx:308:5
>     #45 0x7f95536946e7 in framework::LoadEnv::loadComponentFromURL(com::sun::star::uno::Reference<com::sun::star::frame::XComponentLoader> const&, com::sun::star::uno::Reference<com::sun::star::uno::XComponentContext> const&, rtl::OUString const&, rtl::OUString const&, int, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) /framework/source/loadenv/loadenv.cxx:168:14
>     #46 0x7f955376867d in framework::Desktop::loadComponentFromURL(rtl::OUString const&, rtl::OUString const&, int, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) /framework/source/services/desktop.cxx:591:16
>     #47 0x7f95537688a6 in non-virtual thunk to framework::Desktop::loadComponentFromURL(rtl::OUString const&, rtl::OUString const&, int, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) /framework/source/services/desktop.cxx
>     #48 0x7f9569f7cafa in unotest::MacrosTest::loadFromDesktop(rtl::OUString const&, rtl::OUString const&, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) /unotest/source/cpp/macros_test.cxx:71:62
>     #49 0x7f9580718c56 in UnoApiTest::loadWithParams(rtl::OUString const&, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) /test/source/unoapi_test.cxx:126:19
>     #50 0x7f9580717ef8 in UnoApiTest::load(rtl::OUString const&, char const*) /test/source/unoapi_test.cxx:108:5
>     #51 0x7f9580719254 in UnoApiTest::loadFromFile(std::basic_string_view<char16_t, std::char_traits<char16_t> >, char const*) /test/source/unoapi_test.cxx:132:5
>     #52 0x7f95d8bf1018 in testTdf123647::TestBody() /chart2/qa/extras/chart2export2.cxx:1242:5

(<https://ci.libreoffice.org//job/lo_ubsan/3048/>)

Change-Id: I870d811e78b8c55b84627ae609f98f623465dd9d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/162294
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <[email protected]>

oox/source/drawingml/chart/plotareaconverter.cxx

@@ -304,7 +304,8 @@ PlotAreaConverter::PlotAreaConverter( const ConverterRoot& rParent, PlotAreaMode
     ConverterBase< PlotAreaModel >( rParent, rModel ),
     mb3dChart( false ),
     mbWall3dChart( false ),
-    mbPieChart( false )
+    mbPieChart( false ),
+    mbSingleSeriesTitle( false )
 {
 }