* call.c (compare_qual): Remove.
	(is_subseq): Tweak.
	(is_properly_derived_from): New function.
	(maybe_handle_ref_bind): Likewise.
	(maybe_handle_implicit_object): Likewise.
	(compare_ics): Modify substantially to bring into conformance with
	the standard.
	* cp-tree.h (TYPE_PTRMEMFUNC_OBJECT_TYPE): New macro.
	(comp_cv_qualification): Declare.
	(comp_cv_qual_signature): Likewise.
	* typeck.c (comp_cv_qualification): Likewise.
	(comp_cv_qual_signature): Likewise.

From-SVN: r19880