fixed typo

src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/widget/textarea_field.php

@@ -1 +1 @@
-<?php echo $generator->contentTag('textarea', $view->escape($field->getDisplayedData()), $attributes) ?>
+<?php echo $generator->contentTag('textarea', $view->escape($origin->getDisplayedData()), $attributes) ?>