From cfbcc5ece022fc74ae9b987e05c2807df0d82ec5 Mon Sep 17 00:00:00 2001
From: Vincent Rabaud <vrabaud@google.com>
Date: Thu, 16 Jun 2016 10:34:26 +0200
Subject: [PATCH] Make sure to consider small distances in LZ77.

This could corrupt certain images since commit
a3611513d2bf465fd282d9dc45b3f72c79c232ad

Change-Id: Ifbe43abaafe8efb27c62af18039fea5a9dc4e062
---
 src/enc/backward_references.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/enc/backward_references.c b/src/enc/backward_references.c
index c7bddcaf..314ca894 100644
--- a/src/enc/backward_references.c
+++ b/src/enc/backward_references.c
@@ -464,7 +464,7 @@ static int BackwardReferencesLz77(int xsize, int ysize,
         }
       }
     } else {
-      len = 1;
+      len = (len == 0) ? 1 : len;
     }
     // Go with literal or backward reference.
     assert(len > 0);