[FFmpeg-cvslog] aacps: avoid division by zero in stereo_processing

[Andreas Cadhalpun]

ffmpeg | branch: master | Andreas Cadhalpun <andreas.cadhalpun at googlemail.com> | Sun Nov  8 22:04:08 2015 +0100| [ef7fe9851e0913a2e8d27d55bcb84847a6efa7ca] | committer: Rostislav Pehlivanov

aacps: avoid division by zero in stereo_processing

This fixes a SIGFPE crash in the aac_fixed decoder.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
Reviewed-by: Rostislav Pehlivanov <atomnuker at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ef7fe9851e0913a2e8d27d55bcb84847a6efa7ca
---

 libavcodec/aacps.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/aacps.c b/libavcodec/aacps.c
index 1165d9b..ccc79ff 100644
--- a/libavcodec/aacps.c
+++ b/libavcodec/aacps.c
@@ -940,7 +940,7 @@ static void stereo_processing(PSContext *ps, INTFLOAT (*l)[32][2], INTFLOAT (*r)
             LOCAL_ALIGNED_16(INTFLOAT, h_step, [2], [4]);
             int start = ps->border_position[e];
             int stop  = ps->border_position[e+1];
-            INTFLOAT width = Q30(1.f) / (stop - start);
+            INTFLOAT width = Q30(1.f) / ((stop - start) ? (stop - start) : 1);
 #if USE_FIXED
             width <<= 1;
 #endif