85393c3223
allocate a static buffer, which is added at the end of short packets to pad the buffer to ETHER_MIN_LEN - ETHER_CRC_LEN. While I'm there fix 2 bugs: in qeinit(), unload the right dmamap if bus_dmamap_load fails in qestart, don't dmamap_load the mbuf if its len is 0. Tested on simh-vax.