From ec09b18c9c44f85ceb6d9e7588a03a221cd1193f Mon Sep 17 00:00:00 2001
From: tbrehm <t.brehm@ispconfig.org>
Date: Fri, 12 Dec 2008 05:47:05 -0500
Subject: [PATCH] Disallow server changes for existing records in mail_domain_edit.php

---
 install/lib/install.lib.php |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/install/lib/install.lib.php b/install/lib/install.lib.php
index 473dc9f..b624be4 100644
--- a/install/lib/install.lib.php
+++ b/install/lib/install.lib.php
@@ -556,7 +556,7 @@
 
 function is_installed($appname) {
 	exec('which '.escapeshellcmd($appname),$out);
-	if(stristr($out[0],$appname)) {
+	if(isset($out[0]) && stristr($out[0],$appname)) {
 		return true;
 	} else {
 		return false;

--
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