Followup r94353; Use !== null since that's what we use in core.

diff --git a/includes/interwiki/Interwiki.php b/includes/interwiki/Interwiki.php
index 711fea4..d1592c0 100644 (file)
--- a/includes/interwiki/Interwiki.php
+++ b/includes/interwiki/Interwiki.php
@@ -321,7 +321,7 @@ class Interwiki {
         */
        public function getURL( $title = null ) {
                $url = $this->mURL;
-               if( isset($title) ) {
+               if( $title !== null ) {
                        $url = str_replace( "$1", wfUrlencode( $title ), $url );
                }
                return $url;