From 8c78df0ea36abc7d46c4f59670289f4280f75507 Mon Sep 17 00:00:00 2001
From: Dodji Seketeli <dodji@seketeli.org>
Date: Thu, 30 Aug 2007 22:31:47 +0200
Subject: [PATCH] Xserver: fix potential crash

	* dix/extension.c:
	  (AddExtensionAlias): don't crash when failed to add
	  extension alias.
---
 dix/extension.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dix/extension.c b/dix/extension.c
index 186574d76..4c0c3d236 100644
--- a/dix/extension.c
+++ b/dix/extension.c
@@ -184,6 +184,8 @@ _X_EXPORT Bool AddExtensionAlias(char *alias, ExtensionEntry *ext)
     char *name;
     char **aliases;
 
+    if (!ext)
+        return FALSE ;
     aliases = (char **)xrealloc(ext->aliases,
 				(ext->num_aliases + 1) * sizeof(char *));
     if (!aliases)