lagarith: Fix typo in printf format string

libavcodec/lagarith.c:671:16: warning: '#' flag used with ‘%u’ gnu_printf format [-Wformat]

libavcodec/lagarith.c

@@ -668,7 +668,7 @@ static int lag_decode_frame(AVCodecContext *avctx,
         break;
     default:
         av_log(avctx, AV_LOG_ERROR,
-               "Unsupported Lagarith frame type: %#"PRIu8"\n", frametype);
+               "Unsupported Lagarith frame type: %#"PRIx8"\n", frametype);
         return -1;
     }