Cast exception instance to string before give it to protocolError().

git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@1153 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/handler.py

@@ -108,6 +108,7 @@ class EventHandler(object):
             conn.answer(protocol.notReady('retry later'), packet.getId())
             conn.abort()
         except ProtocolError, message:
+            message = str(message)
             conn.answer(protocol.protocolError(message), packet.getId())
             conn.abort()