avcodec/eatqi: Return more specific error code from tqi_decode_mb()

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/eatqi.c

@@ -83,7 +83,7 @@ static int tqi_decode_mb(TqiContext *t, int16_t (*block)[64])
         if (ret < 0) {
             av_log(t->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
                    t->mb_x, t->mb_y);
-            return -1;
+            return ret;
         }
     }