c-parse.in (parmlist_or_identifiers): Add maybe_attribute.

2002-01-16  Aldy Hernandez  <aldyh@redhat.com>

        * c-parse.in (parmlist_or_identifiers): Add maybe_attribute.
        (parmlist_or_identifiers_1): Verify that only a parmlist follows
        an attribute.

        * gcc.dg/20020115-1.c: New.

From-SVN: r49161