method.c (build_decl_overload_real): Fix namespace handling.

method.c (build_decl_overload_real): Fix namespace handling.

	* method.c (build_decl_overload_real): Fix namespace handling.
	* typeck.c (build_unary_op): Extract a lone function from an
	OVERLOAD.
	* call.c (build_scoped_method_call): Handle getting a namespace
	for basetype in a destructor call.
	(check_dtor_name): Handle enums.
	* parse.y (using_directive): New nonterminal.
	(extdef, simple_stmt): Use it.

From-SVN: r21174