From 6c695ae7c8be363a0ed845ff94aece9e8d42f51d Mon Sep 17 00:00:00 2001
From: Manuel Schneider <80686@users.mediawiki.org>
Date: Wed, 13 Dec 2006 10:26:37 +0000
Subject: [PATCH] added additional check to avoid warnings

---
 includes/Title.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/includes/Title.php b/includes/Title.php
index 8912dbc6ea..e1ee2ac629 100644
--- a/includes/Title.php
+++ b/includes/Title.php
@@ -1223,7 +1223,12 @@ class Title {
 	 */
 	function isSubpage() {
 		global $wgNamespacesWithSubpages;
-		return ( strpos( $this->getText(), '/' ) !== false && $wgNamespacesWithSubpages[ $this->mNamespace ] == true );
+		
+		if( isset( $wgNamespacesWithSubpages[ $this->mNamespace ] ) ) {
+			return ( strpos( $this->getText(), '/' ) !== false && $wgNamespacesWithSubpages[ $this->mNamespace ] == true );
+		} else {
+			return false;
+		}
 	}
 
 	/**
-- 
2.20.1