Path Disclosure

/wp-content/plugins/wordpress-toolbar/wp-toolbar.php
( call to undefined function add_action() )
-----------------------------------------------------------------
1: <?php
12: include_once("socialsites.php");
14: add_action('admin_menu','wordpress_toolbar_admin') ;
-----------------------------------------------------------------

example:
http://www.watblog.com/wp-content/plugins/wordpress-toolbar/wp-toolbar.php