[Bug preprocessor/92696] #pragma GCC diagnostic ... interferes with if/else

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92696

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Also #pragma are considered statements.  There is another issue like this but
instead using _Pragma .