PR c++/16829

	PR c++/16829
	* decl.c (start_preparsed_function): Check default arguments
	unconditionally.
	* name-lookup.c (pushdecl_maybe_friend): Check default arguments
	of all functions and function templates.
	* parser.c (cp_parser_late_parsing_default_args): Check default
	arguments.
	* decl2.c (check_default_args): Set missing default arguments to
	error_mark_node.

	* g++.dg/other/default2.C: New test.
	* g++.dg/other/default3.C: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@109950 138bc75d-0d04-0410-961f-82ee72b054a4