Fixed default value of trace_sip in sip_message

darcs-hash:20090214020246-1e3d8-ddf74645b64182ac09653bc6a2ce4593b65c6654
Fixed default value of trace_sip in sip_publish_presence

darcs-hash:20090214020335-1e3d8-e71e4e1798885049da0ff0fc21ff6c35ac09b4cb