[Bug c++/114571] -Wzero-as-null-pointer-constant does not complain about NULL

[ossman at cendio dot se via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114571

--- Comment #3 from Pierre Ossman <ossman at cendio dot se> ---
And another odd case; gcc 5 complains about this:

> const char *a;
> a = NULL;

but not:

> const char *a = NULL;

gcc 13 complains about neither, and clang about both.