72d9196f1e
This was crashing due to NULL-pointer dereference QMP Test case: ============== (QEMU) query-vm-generation-id {"error": {"class": "GenericError", "desc": "VM Generation ID device not found"}} HMP Test case: ============== virsh # qemu-monitor-command --hmp 3 info vm-generation-id VM Generation ID device not found Signed-off-by: Ben Warren <ben@skyportsystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>