[Bug c/88662] Document trap representations of _Bool

[vincent-gcc at vinc17 dot net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88662

--- Comment #15 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
Some clarification to what I've said: I mean that GCC should document that
nonzero padding bits for _Bool give non-value representations (such
representations are not necessarily trap representations, contrary to what the
bug title "Document trap representations of _Bool" seems to imply).