[FFmpeg-cvslog] mpegvideo_enc: fix a signed overflow

[Mans Rullgard]

ffmpeg | branch: release/0.8 | Mans Rullgard <mans at mansr.com> | Sun Oct  9 20:32:58 2011 +0100| [af0a56e6ef3dcc140b960808b8a419d32a229775] | committer: Reinhard Tartler

mpegvideo_enc: fix a signed overflow

Signed-off-by: Mans Rullgard <mans at mansr.com>
(cherry picked from commit 05795f35be4b479bfa8d60ed3eb13e0f89e439c0)

Signed-off-by: Anton Khirnov <anton at khirnov.net>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=af0a56e6ef3dcc140b960808b8a419d32a229775
---

 libavcodec/mpegvideo_enc.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 51713a2..ab717eb 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -2006,7 +2006,7 @@ static int mb_var_thread(AVCodecContext *c, void *arg){
             int varc;
             int sum = s->dsp.pix_sum(pix, s->linesize);
 
-            varc = (s->dsp.pix_norm1(pix, s->linesize) - (((unsigned)(sum*sum))>>8) + 500 + 128)>>8;
+            varc = (s->dsp.pix_norm1(pix, s->linesize) - (((unsigned)sum*sum)>>8) + 500 + 128)>>8;
 
             s->current_picture.mb_var [s->mb_stride * mb_y + mb_x] = varc;
             s->current_picture.mb_mean[s->mb_stride * mb_y + mb_x] = (sum+128)>>8;