Update locking's "__all__" (forgotten in r1757).

git-svn-id: https://svn.erp5.org/repos/neo/trunk@1774 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/locking.py

@@ -21,7 +21,7 @@ from Queue import Empty
   classes).
 """
 
-__all__ = ['Lock', 'RLock']
+__all__ = ['Lock', 'RLock', 'Queue', 'Empty']
 
 VERBOSE_LOCKING = False