[Patch, Fortran] PR 37201 - fix character-returning bind(c) functions

[Jerry DeLisle]

Tobias Burnus wrote:
> This patch fixes a left over of PR 34079, which partially fixed
> character-returning function, which then worked in assignments but not
> as actual argument to other functions or in I/O statements.
> 
> Build & regtesting (libgomp [finished] and check-gfortran [almost finished]).
> OK for the trunk (when regtesting is successful)?
> 
> Tobias
> 
OK to commit.  Also add PR for the other situation we discussed on IRC.

Thanks,

Jerry