testPngNativetZtxt requires zlib extension

[lhc/web/wiklou.git] / includes / CategoryPage.php

diff --git a/includes/CategoryPage.php b/includes/CategoryPage.php
index 32e270e..3e69dd4 100644 (file)
--- a/includes/CategoryPage.php
+++ b/includes/CategoryPage.php
@@ -56,7 +56,7 @@ class CategoryPage extends Article {
                $diffOnly = $request->getBool( 'diffonly',
                        $this->getContext()->getUser()->getOption( 'diffonly' ) );
 
-               if ( isset( $diff ) && $diffOnly ) {
+               if ( $diff !== null && $diffOnly ) {
                        parent::view();
                        return;
                }