PR c++/41468
	* class.c (convert_to_base): Add complain parameter.  Pass
	ba_quiet to lookup_base if we don't want errors.
	(build_vfield_ref): Pass complain to convert_to_base.
	* call.c (convert_like_real): Likewise.
	(initialize_reference): Likewise.
	(perform_direct_initialization_if_possible): Pass complain to
	convert_like_real.
	* cp-tree.h: Adjust.

From-SVN: r158798