[Bug c/118639] [OpenMP] c_parser_omp_variable_list wrongly accepts a tailing comma: 'omp flush(a,)'

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118639

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 60262
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60262&action=edit
gcc15-pr118639.patch

Lightly tested fix (so far).