Catch event queue event

Author: Cuda-Chen

virtio-snd.c

@@ -718,6 +718,9 @@ static bool virtio_snd_reg_write(virtio_snd_state_t *vsnd,
             case VSND_QUEUE_CTRL:
                 virtio_queue_notify_handler(vsnd, value);
                 break;
+            case VSND_QUEUE_EVT:
+                fprintf(stderr, "VSND_QUEUE_EVT\n");
+                break;
             case VSND_QUEUE_TX:
                 fprintf(stderr, "VSND_QUEUE_TX\n");
                 break;