[Bug c/68966] atomic_fetch_* on atomic_bool not diagnosed

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68966

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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  Attachment #37077|0                           |1
        is obsolete|                            |

--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Created attachment 37078
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37078&action=edit
Prototype patch.

Attached a real patch this time.