initialize vectors for all vqs to VIRTIO_NO_VECTOR rather than 0 which
is a valid vector. This fixes migration which happened before driver
was loaded.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reported-by: NAmit Shah <amit.shah@redhat.com>
Tested-by: NAmit Shah <amit.shah@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>