Merge commit 'c7d9b473e28238d4a4ef1b7e8b42c1cca256da36'

* commit 'c7d9b473e28238d4a4ef1b7e8b42c1cca256da36':
  cdgraphics: do not return 0 from the decode function

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

libavcodec/cdgraphics.c

@@ -353,10 +353,9 @@ static int cdg_decode_frame(AVCodecContext *avctx,
         *got_frame = 1;
     } else {
         *got_frame = 0;
-        buf_size   = 0;
     }
 
-    return buf_size;
+    return avpkt->size;
 }
 
 static av_cold int cdg_decode_end(AVCodecContext *avctx)