accomodate changed #classes;

--- a/src/HOL/Tools/refute.ML	Sat Jun 11 22:15:50 2005 +0200
+++ b/src/HOL/Tools/refute.ML	Sat Jun 11 22:15:51 2005 +0200
@@ -507,7 +507,7 @@
 					| _               => raise REFUTE ("collect_axioms", "type " ^ Sign.string_of_typ (sign_of thy) T ^ " is not a variable"))
 				(* obtain all superclasses of classes in 'sort' *)
 				(* string list *)
-				val superclasses = Graph.all_succs ((#classes o Type.rep_tsig o Sign.tsig_of o sign_of) thy) sort
+				val superclasses = Graph.all_succs ((#2 o #classes o Type.rep_tsig o Sign.tsig_of o sign_of) thy) sort
 			in
 				Library.foldl collect_class_axioms (axs, superclasses)
 			end

--- a/src/Pure/type_infer.ML	Sat Jun 11 22:15:50 2005 +0200
+++ b/src/Pure/type_infer.ML	Sat Jun 11 22:15:51 2005 +0200
@@ -523,7 +523,7 @@
     val raw_ts' =
       map (decode_types tsig is_const def_type def_sort map_const map_type map_sort) raw_ts;
     val (ts, Ts, unifier) = basic_infer_types pp const_type
-      classes arities used freeze is_param raw_ts' pat_Ts';
+      (#2 classes) arities used freeze is_param raw_ts' pat_Ts';
   in (ts, unifier) end;
 
 end;