[Bug c/112556] Null pointer constants with enumeration type are not accepted

[luigighiron at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112556

--- Comment #1 from Halalaluyafail3 <luigighiron at gmail dot com> ---
This bug also seems to happen with boolean types:

void*p=(_Bool)0;

Furthermore, this bug only seems to happen when the type
of the null pointer constant is an enumeration or boolean type:

void*p1=+(_Bool)0,*p2=+(enum{E})E;

No errors are generated for this code.