Correct assignment of interlaced_frame; was being set on output frames,

in display order, based on decoding information in decoding order. Now
set properly, immediately upon completion of decode.

Based on original patch from Reinhard Nissl,  rnisssl % gmx , de
Original Thread: [FFmpeg-devel] H.264 + PAFF: BBC HD recording shows
extreme interlacing artefacts, Thu, 01 Nov 2007 22:43:09

Originally committed as revision 10931 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h264.c

@@ -7763,6 +7763,8 @@ static int decode_frame(AVCodecContext *avctx,
             *data_size = 0;
 
         } else {
+            cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
+
         //FIXME do something with unavailable reference frames
 
 #if 0 //decode order
@@ -7845,7 +7847,6 @@ static int decode_frame(AVCodecContext *avctx,
     /* we substract 1 because it is added on utils.c    */
     avctx->frame_number = s->picture_number - 1;
 #endif
-    pict->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
     return get_consumed_bytes(s, buf_index, buf_size);
 }
 #if 0