re PR c++/7019 ([3.3 only] SFINAE does not work with explicitally specified template...

re PR c++/7019 ([3.3 only] SFINAE does not work with explicitally specified template arguments)

	PR c++/7019
	* cp-tree.h (lookup_qualified_name): Adjust prototype.
	* decl.c (lookup_qualified_name): Add complain parameter.  Adjust
	call to is_aggr_type.
	* parser.c (cp_parser_lookup_name): Adjust call to
	lookup_qualified_name.
	* pt.c (tsubst_qualified_id): Likewise.
	(tsubst_copy_and_build): Likewise.
	* semantics.c (finish_qualified_id_expr): Deal with erroneous
	expressions.

	PR c++/7019
	* g++.dg/template/overload2.C: New test.

From-SVN: r69342