only storage node can send "notify partition changes" messages

git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@245 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/master/service.py

@@ -627,6 +627,11 @@ class ServiceEventHandler(MasterEventHandler):
             self.handleUnexpectedPacket(conn, packet)
             return
 
+        if not isinstance(node, StorageNode):
+            self.handleUnexpectedPacket(conn, packet)
+            return
+
+
         new_cell_list = []
         for cell in cell_list:
             if cell[2] != UP_TO_DATE_STATE: