[Patch, Fortran] PR 44352: Fix String-assigning ICE with statement functions

[Paul Richard Thomas]

Tobias,

> Build on x86-64-linux.
> OK for 4.4, 4.5 and the trunk?
>

Yes, of course.  OK for 4.4-4.6

+	  arglen = TYPE_MAX_VALUE (TYPE_DOMAIN (type));
will do great things for deferred length characters :-)

Thanks

Paul