[SCM] libav/experimental: Convert a for() loop into a while() loop for the downward part of the exponent delta limiting.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit cdedf7e6254024c643532d45ac7c68e84e50eb01
Author: Justin Ruggles <justin.ruggles at gmail.com>
Date:   Thu Dec 16 21:09:08 2010 +0000

    Convert a for() loop into a while() loop for the downward part of the exponent
    delta limiting.
    
    Originally committed as revision 26035 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index 7d3666a..212a221 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -639,7 +639,8 @@ static void encode_exponents_blk_ch(uint8_t *exp,
        differentially encoded */
     for (i = 1; i <= nb_groups; i++)
         exp[i] = FFMIN(exp[i], exp[i-1] + 2);
-    for (i = nb_groups-1; i >= 0; i--)
+    i--;
+    while (--i >= 0)
         exp[i] = FFMIN(exp[i], exp[i+1] + 2);
 
     /* now we have the exponent values the decoder will see */

-- 
Libav/FFmpeg packaging