CPreprocessor: branches skip inside code block

[ArcsinX]

ctags does not skip preprocessor branches if we are not inside {}.

Input:

#ifdef A
int a;
#else
int b;
#endif

Output:

a       test.cpp       /^int a;$/;"    kind:variable   line:2  typeref:typename:int    end:2
b       test.cpp       /^int b;$/;"    kind:variable   line:4  typeref:typename:int    end:4

But, if preprocessor branches are inside {} then the second branch is skipped.

Input:

extern "C" {
#ifdef A
int a;
#else
int b;
#endif
}

Output:

a       test.cpp       /^int a;$/;"    kind:variable   line:3  typeref:typename:int    end:3

This looks inconsistent and the problem is here:
https://github.com/universal-ctags/ctags/blob/master/parsers/cxx/cxx_parser_block.c#L262

I think that we can remove cppBeginStatement() call here because:

• seems the fact that we are inside some code block (function, namespace, extern "C", etc.) is not a good enough reason to skip (resolve) branches.
• this change does not break any test

[ArcsinX]

Sorry, seems it's duplicate of #2647