[Bug c/29467] -ansi -pedantic accepts _Bool without diagnostic

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29467

--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2012-04-23 21:22:38 UTC ---
I'd say it's a quality-of-implementation issue, but it probably would be 
best to diagnose this.  I've added such diagnostics for C11 keywords such 
as _Noreturn and _Static_assert outside C11 mode when adding support for 
those keywords, for example.