[Bug fortran/100337] Should be able to pass non-present optional arguments to CO_BROADCAST

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100337

--- Comment #4 from Andre Vehreschild <vehre at gcc dot gnu.org> ---
Waiting two weeks before backporting to gcc-11.