fix SKF_METHOD_free close handle issue

Signed-off-by: wangzeyu <[email protected]>

src/skf/skf_meth.c

@@ -132,6 +132,6 @@ SKF_METHOD *SKF_METHOD_load_library(const char *so_path)
 void SKF_METHOD_free(SKF_METHOD *meth)
 {
 	if (meth)
-		free(meth->dso);
+		dylib_close_library(meth->dso);
 	free(meth);
 }