[Bug c++/111087] -Wnonnull issued for std::array of zero size when under C++20

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111087

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
just since GCC decides to act const in some cases like constexpr especially
with -std=c++20, you get the warning.