[Bug c++/120449] g++ -Wtype-limits without -P doesn't warn on unsigned compare to zero

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120449

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
-Wsystem-headers .