CMake

fix for buffer size calculation in osce.c #1

Job	Run time
CMake MINGW	1m 30s
Test build with CMake 3.16.0	1m 31s
CMake/Android/So/ARMv8/Release	48s
CMake/Android/So/X86/Release	46s
CMake/Android/So/X64/Release	54s
CMake/Windows/Dll/X86/Release	2m 16s
CMake/Windows/Dll/X64/Release	1m 56s
CMake/Windows/Dll/ARMv8/Release	1m 51s
CMake/Linux/So/X64/Release	57s
CMake/MacOSX/So/X64/Release	30s
CMake/MacOSX/Framework/X64/Release	1m 55s
CMake/iOS/Dll/arm64/Release	55s
CMake/iOS/Framework/arm64/Release	1m 18s
CMake/Windows/Lib/X86/Release	3m 1s
CMake/Windows/Lib/X64/Release	2m 36s
CMake/Windows/Lib/armv8/Release	2m 18s
CMake/Linux/Lib/X64/Release	1m 26s
CMake/MacOSX/Lib/X64/Release	1m 22s
CMake/iOS/Lib/arm64/Release	58s
CMake/Android/Lib/ARMv8/Release	55s
CMake/Android/Lib/X86/Release	1m 24s
CMake/Android/Lib/X64/Release	1m 20s
CMake/CustomModes/Linux/Lib/X64/Release	1m 58s
CMake/AssertionsFuzz/Windows/Lib/X64/Release	2m 52s
CMake/AssertionsFuzz/Linux/Lib/X64/Release	1m 31s
CMake/AssertionsFuzz/MacOSX/Lib/X64/Release	2m 7s
	40m 55s

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