fix preview section editing bug

diff --git a/includes/Article.php b/includes/Article.php
index 2afda77..797ceae 100644 (file)
--- a/includes/Article.php
+++ b/includes/Article.php
@@ -384,7 +384,7 @@ class Article {
                global $oldid, $redirect, $section;
                global $wgLang;
 
-               if($wpSection) { $section=$wpSection; }
+               if(isset($wpSection)) { $section=$wpSection; }
 
                $sk = $wgUser->getSkin();
                $isConflict = false;