Merge pull request kriswallsmith#98 from nikic/patch-1

Update Twig Extension to be compatible with Twig/da4d964047d7240ac23bc771

src/Assetic/Extension/Twig/TwigFormulaLoader.php

@@ -61,7 +61,7 @@ private function loadNode(\Twig_Node $node)
                 ),
             );
         } elseif ($node instanceof \Twig_Node_Expression_Function) {
-            $name = $node->getNode('name')->getAttribute('name');
+            $name = $node->getAttribute('name');
             if ($this->twig->getFunction($name) instanceof AsseticFilterFunction) {
                 $arguments = array();
                 foreach ($node->getNode('arguments') as $argument) {