Correct the error TypeError: object of type 'NoneType' has no len() on messages without payload.
Correct the error TypeError: object of type 'NoneType' has no len() on messages without payload.

arskom/spyne,martijnvermaat/rpclib,soaplib/soaplib,arskom/spyne,soaplib/soaplib,martijnvermaat/rpclib,martijnvermaat/rpclib,arskom/spyne,soaplib/soaplib