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/Python/import.c b/Python/import.c
index ec21b4c..395114b 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -303,7 +303,7 @@
 			}
 		}
 	}
-	v = eval_code(co, d, d, (object *)NULL);
+	v = eval_code(co, d, d, (object *)NULL, (object *)NULL);
 	DECREF(co);
 	return v;
 }
@@ -422,7 +422,7 @@
 		return -1;
 	if ((m = add_module(name)) == NULL ||
 	    (d = getmoduledict(m)) == NULL ||
-	    (v = eval_code(co, d, d, (object *)NULL)) == NULL) {
+	    (v = eval_code(co, d, d, (object*)NULL, (object*)NULL)) == NULL) {
 		DECREF(co);
 		return -1;
 	}