[patch, fortran] Fix PR 87673, rejects-valid

[Thomas Koenig]

Hello world,

the attached patch fixes a 7/8/9 regression by removing
the call to gfc_resovle_expr during matching.  It turned
out that gfc_resolve_expr depends on some conditions
that are not yet met during the matching phase.

Fortunately, the bug that this originally fixed (PR 82049)
has been fixed another way on trunk, so that just removing
this part works.  For backporting, it would be necessary to
check if the fix(es) would need to be backported if they haven't
been already - probably one or several of Harald's patches.

So, OK for trunk? OK for backporting?

Regards

	Thomas

2019-03-10  Thomas Koenig  <tkoenig@gcc.gnu.org>

         PR fortran/87673
         * match.c (gfc_match_type_spec): Remove call to
         gfc_resolve_expr for character length.

2019-03-10  Thomas Koenig  <tkoenig@gcc.gnu.org>

         PR fortran/87673
         * gfortran.dg/charlen_17.f90: New patch.
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