virtio-pci: trivial fixes in error message

Signed-off-by: NGreg Kurz <groug@kaod.org>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/virtio/virtio-pci.c

@@ -1585,7 +1585,7 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
     if (legacy) {
         if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) {
             error_setg(errp, "VIRTIO_F_IOMMU_PLATFORM was supported by"
-                       "neither legacy nor transitional device.");
+                       " neither legacy nor transitional device");
             return ;
         }
         /*