Fortran: force error on bad KIND specifier [PR88552]

gcc/fortran/ChangeLog:

	PR fortran/88552
	* decl.cc (gfc_match_kind_spec): Use error path on missing right
	parenthesis.
	(gfc_match_decl_type_spec): Use error return when an error occurred
	during matching a KIND specifier.

gcc/testsuite/ChangeLog:

	PR fortran/88552
	* gfortran.dg/pr88552.f90: New test.