* cp-tree.def: Add WRAPPER.  USER_CONV now only has two ops.
	* cp-tree.h: Add WRAPPER support.
	* call.c (add_candidate): Split out from add_*_candidate fns.
	(build_over_call): Take the candidate instead of function and args.
	Enforce access control here.  Emit overload warnings here.
	(add_warning): New fn.
	(joust): Add WARN parm.  If not set, call add_warning instead of
	printing a warning.  Reenable some warnings.
	(tourney): Pass it.
	(convert_like): Adjust.
	(build_new_op): Adjust.
	(build_new_function_call): Adjust.
	(build_user_type_conversion_1): Adjust.
	(USER_CONV_FN): Adjust.
	* tree.c (build_expr_wrapper, build_expr_ptr_wrapper,
	build_int_wrapper): New fns.

From-SVN: r19393