Merge commit 'feec9349'

* commit 'feec9349':
  mpegvideo: unref cur/next/prev frames when flushing
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/mpegvideo.c

@@ -3074,6 +3074,10 @@ void ff_mpeg_flush(AVCodecContext *avctx){
         ff_mpeg_unref_picture(s, &s->picture[i]);
     s->current_picture_ptr = s->last_picture_ptr = s->next_picture_ptr = NULL;
 
+    ff_mpeg_unref_picture(s, &s->current_picture);
+    ff_mpeg_unref_picture(s, &s->last_picture);
+    ff_mpeg_unref_picture(s, &s->next_picture);
+
     s->mb_x= s->mb_y= 0;
     s->closed_gop= 0;