mmal/deinterlace: Release picture if unable to process

When an input picture can not be handled due to lack of resources we need to
free it to avoid a picture leak.
Signed-off-by: Julian Scheel <julian@jusst.de>
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/hw/mmal/deinterlace.c

@@ -452,6 +452,7 @@ static picture_t *deinterlace(filter_t *filter, picture_t *picture)
 
     buffer = mmal_queue_timedwait(sys->input_pool->queue, 2);
     if (!buffer) {
+        picture_Release(picture);
         msg_Err(filter, "Failed to retrieve buffer header for input picture");
         goto out;
     }