intline == 0 is not a valid intline on 386. See pci_cfgintr() in sys/i386/pci/pci_cfgreg.c.
intline == 0 is not a valid intline on 386. See pci_cfgintr() in
sys/i386/pci/pci_cfgreg.c.

This should resolve some cases where adding USB support to the kernel
produced an interrupt storm.

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