fix an mbuf leak when using ipfw to filger bridged packets (from -stable, since this code is not yet active in -current)
fix an mbuf leak when using ipfw to filger bridged packets
(from -stable, since this code is not yet active in -current)

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