From 709d0a1bbc9a10968b21b694019a78e39ef5f49f Mon Sep 17 00:00:00 2001
From: Pieter Noordhuis <pcnoordhuis@gmail.com>
Date: Wed, 3 Mar 2010 18:35:56 +0100
Subject: [PATCH] x->backward never equals zsl->header

---
 redis.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/redis.c b/redis.c
index 1abfd96b..f750ca68 100644
--- a/redis.c
+++ b/redis.c
@@ -4931,8 +4931,7 @@ static int zslDelete(zskiplist *zsl, double score, robj *obj) {
             }
         }
         if (x->forward[0]) {
-            x->forward[0]->backward = (x->backward == zsl->header) ?
-                                        NULL : x->backward;
+            x->forward[0]->backward = x->backward;
         } else {
             zsl->tail = x->backward;
         }
@@ -4977,8 +4976,7 @@ static unsigned long zslDeleteRange(zskiplist *zsl, double min, double max, dict
             }
         }
         if (x->forward[0]) {
-            x->forward[0]->backward = (x->backward == zsl->header) ?
-                                        NULL : x->backward;
+            x->forward[0]->backward = x->backward;
         } else {
             zsl->tail = x->backward;
         }
-- 
2.45.2