AMV: Fix possibly exploitable crash.

Reported-at: Thu, 21 Apr 2011 14:38:25 +0000
Reported-by: Dominic Chell <Dominic.Chell@ngssecure.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/sp5xdec.c

@@ -88,7 +88,6 @@ static int sp5x_decode_frame(AVCodecContext *avctx,
     recoded[j++] = 0xFF;
     recoded[j++] = 0xD9;
 
-    avctx->flags &= ~CODEC_FLAG_EMU_EDGE;
     i = ff_mjpeg_decode_frame(avctx, data, data_size, recoded, j);
 
     av_free(recoded);