Fix fallout from r240071. If destination interface lookup fails, we should broadcast a packet, not try to deliver it to NULL.
Fix fallout from r240071. If destination interface lookup fails,
we should broadcast a packet, not try to deliver it to NULL.

Reported by:	rpaulo

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase