reset write/read buffer when closing the connection

git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@565 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/connection.py

@@ -178,6 +178,8 @@ class Connection(BaseConnection):
             for event in self.event_dict.itervalues():
                 em.removeIdleEvent(event)
             self.event_dict.clear()
+        self.write_buf = ""
+        self.read_buf = ""
 
     def __del__(self):
         self.close()