From 13b6729361d45b9f308d731dd6b82dac01428dc3 Mon Sep 17 00:00:00 2001
From: Vitor Sessak <vitor1001@gmail.com>
Date: Sat, 24 May 2008 16:38:48 +0000
Subject: [PATCH] Use an intermediate variable for overflow testing

Originally committed as revision 13283 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/ra144.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/libavcodec/ra144.c b/libavcodec/ra144.c
index 5cfe94f25e..d4dc47733c 100644
--- a/libavcodec/ra144.c
+++ b/libavcodec/ra144.c
@@ -154,19 +154,22 @@ static void final(const short *i1, const short *i2,
 
     for (i=0; i<len; i++) {
         int sum = 0;
+        int new_val;
 
         for(x=0; x<10; x++)
             sum += i1[9-x] * ptr[x];
 
         sum >>= 12;
 
-        if (ptr[10] - sum < -32768 || ptr[10] - sum > 32767) {
+        new_val = ptr[10] - sum;
+
+        if (new_val < -32768 || new_val > 32767) {
             memset(out, 0, len * 2);
             memset(statbuf, 0, 20);
             return;
         }
 
-        ptr[10] -= sum;
+        ptr[10] = new_val;
         ptr++;
     }