ZMBV encoder forgot to fill coded frame pointer

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@15359 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/zmbvenc.c

@@ -300,6 +300,8 @@ static av_cold int encode_init(AVCodecContext *avctx)
         return -1;
     }
 
+    avctx->coded_frame = (AVFrame*)&c->pic;
+
     return 0;
 }