fixed typo

diff --git a/lib/Twig/Node.php b/lib/Twig/Node.php
index 9aa4d34..58ce258 100644 (file)
--- a/lib/Twig/Node.php
+++ b/lib/Twig/Node.php
@@ -130,7 +130,7 @@ class Twig_Node implements Twig_NodeInterface, ArrayAccess, Countable, IteratorA
      */
     public function offsetExists($name)
     {
-        return $this->attributes[$name];
+        return array_key_exists($name, $this->attributes);
     }
 
     /**