mpegtsmux, closedcaption: Fix some MSVC warnings
closedcaption: Fix broken debug function macros with MSVC build
warning C4003: not enough arguments for function-like macro invocation 'warning'
G_STMT_END macro is extended to the below form with MSVC
__pragma(warning(push)) \
__pragma(warning(disable:4127)) \
while(0) \
__pragma(warning(pop))
So MSVC preprocessor will extend it further to
__pragma(VBI_CAT_LEVEL_LOG(push)) ...
Should rename warning() debug macro function therefore.
mpegtsmux: basetsmux: Don't try to return value from void function
gstbasetsmux.c(1508): warning C4098: 'free_splice': 'void' function returning a value