Use wfEmptyMsg() instead of !$message.

diff --git a/includes/HTMLDiff.php b/includes/HTMLDiff.php
index 34bdc33..ef9e0aa 100644 (file)
--- a/includes/HTMLDiff.php
+++ b/includes/HTMLDiff.php
@@ -1268,7 +1268,7 @@ class TagToString {
 
        protected function translateArgument($name) {
                $translation = wfMsgExt('diff-' . $name, 'parseinline' );
-               if(!$translation){
+               if ( wfEmptyMsg( 'diff-' . $name, $translation ) ) {
                        $translation = $name;
                }
                return htmlspecialchars( $translation );