[Bug c/116871] -Wincompatible-pointer-types for function pointers could highlight the mismatch better

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116871

--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
This matters more when you have quite long typedefs and the difference is just
a const on one parameter.