From 58c41799ab6b52df86b6afe23304f34b62741326 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sat, 24 Dec 2011 03:55:58 +0100
Subject: [PATCH] lzo: fix memcpy_backptr() with 0 offset

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavutil/lzo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavutil/lzo.c b/libavutil/lzo.c
index b3c69cf0c53..0b9d2e42bab 100644
--- a/libavutil/lzo.c
+++ b/libavutil/lzo.c
@@ -137,7 +137,7 @@ static inline void memcpy_backptr(uint8_t *dst, int back, int cnt) {
     const uint8_t *src = &dst[-back];
     if (back == 1) {
         memset(dst, *src, cnt);
-    } else {
+    } else if(back>0) {
 #ifdef OUTBUF_PADDED
         COPY2(dst, src);
         COPY2(dst + 2, src + 2);
-- 
2.39.2