[Bug c/117178] -Wunterminated-string-initialization should ignore trailing NUL byte for nonstring char arrays

[kees at outflux dot net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117178

--- Comment #21 from Kees Cook <kees at outflux dot net> ---
Okay, now with tests and an updated truncation message. :)

Please see:
https://gcc.gnu.org/pipermail/gcc-patches/2024-December/671714.html

(Hopefully I have managed to get coding and commit log style correct...)