[SCM] libav/experimental: Start using intermediate buffers at index 0. These index variables are incremented before each use, so they should be initialized to -1.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 75084e47ffc24bede7acaf00c5e092ca46f52bbc
Author: Ramiro Polla <ramiro.polla at gmail.com>
Date:   Sun Dec 6 22:01:25 2009 +0000

    Start using intermediate buffers at index 0.
    These index variables are incremented before each use, so they should be
    initialized to -1.
    
    Originally committed as revision 29977 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

diff --git a/libswscale/swscale_template.c b/libswscale/swscale_template.c
index 935b8c5..675db6a 100644
--- a/libswscale/swscale_template.c
+++ b/libswscale/swscale_template.c
@@ -2661,8 +2661,8 @@ static int RENAME(swScale)(SwsContext *c, uint8_t* src[], int srcStride[], int s
        will not get executed. This is not really intended but works
        currently, so people might do it. */
     if (srcSliceY ==0) {
-        lumBufIndex=0;
-        chrBufIndex=0;
+        lumBufIndex=-1;
+        chrBufIndex=-1;
         dstY=0;
         lastInLumBuf= -1;
         lastInChrBuf= -1;

-- 
Libav/FFmpeg packaging