Be less picky on invalid invalid frame_pred_frame_dct values.

Fixed issue1615.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@20814 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/mpeg12.c

@@ -1557,7 +1557,7 @@ static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
         s->picture_structure= PICT_FRAME;
     }
 
-    if(s->progressive_frame && !s->frame_pred_frame_dct){
+    if(s->progressive_sequence && !s->frame_pred_frame_dct){
         av_log(s->avctx, AV_LOG_ERROR, "invalid frame_pred_frame_dct\n");
         s->frame_pred_frame_dct= 1;
     }