This change allows the e131 controller to start up even if both unicast and multicast are null.  This should never be the case if serialized correctly but I observed this on Giz's V3 dir when I enabled the e131 controller.  IF I had to guess I'd say the fact that my NICs don't match his led to something bad happening in deserializing.  In any event, however this occurs, this change will allow the controller setup routine to detect the missing NIC id and put of a dialog and disable the universe in question (rather than getting an NPE in the UpdateState entrypoint due to incomplete initialization.