[Bug fortran/36725] g0 edit descriptor: Missing compile-time checking for invalid g0.d

[jvdelisle at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36725

--- Comment #11 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Thomas Henlich from comment #9)
> Created attachment 47827 [details]
> Proposed patch to perform runtime check in fmt_g0_4.f08
> 
> This checks ensure that G0.d output is not broken.

Tested this minor change and will push as simple and obvious.