[Bug c/117687] Wzero-as-nullpointer-constant should warn for zeros of type bool, enum, and _BitInt

[uecker at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117687

--- Comment #1 from uecker at gcc dot gnu.org ---
As discussed in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117059#c10 the
warning should be enhanced to cover these cases.