avcodec/h263dec: print MB position for each MB when TRACE is enabled

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/h263dec.c

@@ -235,6 +235,8 @@ static int decode_slice(MpegEncContext *s)
             s->mv_type = MV_TYPE_16X16;
             av_dlog(s, "%d %d %06X\n",
                     ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
+
+            tprintf(NULL, "Decoding MB at %dx%d\n", s->mb_x, s->mb_y);
             ret = s->decode_mb(s, s->block);
 
             if (s->pict_type != AV_PICTURE_TYPE_B)