re PR c++/8700 (unhelpful error message for binding temp to reference)

re PR c++/8700 (unhelpful error message for binding temp to reference)

	PR c++/8700
	* call.c (convert_class_to_reference): Adjust usage of
	splice_viable.
	(any_viable): Remove.
	(splice_viable): Combine with any_viable.
	(print_z_candidates): Avoid printing duplicates.
	(build_user_type_conversion_1): Adjust usage of splice_viable.
	(build_new_function_call): Likewise.
	(build_operator_new_call): Likewise.
	(build_object_call): Likewise.
	(build_conditional_expr): Likewise.
	(build_new_op): Likewise.
	(build_new_method_call): Likewise.
	(joust): Remove spurious comment.
	* cp-tree.h (DECL_FRIENDLIST): Correct documentation.
	* decl2.c (arg_assoc_class): Simplify.
	* friend.c (add_friend): Likewise.

From-SVN: r64173