Access checks now work, at least for instance data (not for methods
yet).  The class is now passed to eval_code and stored in the current
frame.  It is also stored in instance method objects.  An "unbound"
instance method is now returned when a function is retrieved through
"classname.funcname", which when called passes the class to eval_code.
diff --git a/Include/eval.h b/Include/eval.h
index 8ac672f..a7a0ec8 100644
--- a/Include/eval.h
+++ b/Include/eval.h
@@ -24,4 +24,5 @@
 
 /* Interface to execute compiled code */
 
-object *eval_code PROTO((codeobject *, object *, object *, object *));
+object *eval_code
+	PROTO((codeobject *, object *, object *, object *, object *));