[Bug c/101297] Spurious comma accepted at the end of #pragma omp atomic

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101297

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 51102
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51102&action=edit
gcc12-pr101297.patch

Untested fix.