c++: dependent conversion operator lookup [PR106179]

This testcase demonstrates that my assumption that we would only be
interested in a class template lookup if the template-id is followed by ::
was wrong.

	PR c++/106179
	PR c++/106024


	* parser.cc (cp_parser_lookup_name): Remove :: requirement
	for using unqualified lookup result.


	* g++.dg/template/operator16.C: New test.
2 files changed