From 9a1bfc924bd39d0a83945d5dccc0a3e7609b3c6c Mon Sep 17 00:00:00 2001
From: Tim Starling <tstarling@users.mediawiki.org>
Date: Wed, 3 Jun 2009 16:33:08 +0000
Subject: [PATCH] Fix for r49412, possible fatal errors.

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

diff --git a/includes/diff/DifferenceEngine.php b/includes/diff/DifferenceEngine.php
index 5e6b9c77cf..117c2ecc0e 100644
--- a/includes/diff/DifferenceEngine.php
+++ b/includes/diff/DifferenceEngine.php
@@ -46,7 +46,12 @@ class DifferenceEngine {
 	function __construct( $titleObj = null, $old = 0, $new = 0, $rcid = 0,
 		$refreshCache = false, $htmldiff = false, $unhide = false )
 	{
-		$this->mTitle = $titleObj;
+		if ( $titleObj ) {
+			$this->mTitle = $titleObj;
+		} else {
+			global $wgTitle;
+			$this->mTitle = $wgTitle;
+		}
 		wfDebug("DifferenceEngine old '$old' new '$new' rcid '$rcid'\n");
 
 		if ( 'prev' === $new ) {
-- 
2.20.1