From c15548e05e7f61ce42accca979616f0443cf00f1 Mon Sep 17 00:00:00 2001
From: ryan <ryan@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Mon, 2 Jan 2012 21:37:16 +0000
Subject: [PATCH] Make sure that _render() is only called with a valid root
 object. As in, render() can only be validly called once and must not fail on
 the second call. props SergeyBiryukov, fixes #19642 for 3.3

git-svn-id: http://svn.automattic.com/wordpress/branches/3.3@19644 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/class-wp-admin-bar.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wp-includes/class-wp-admin-bar.php b/wp-includes/class-wp-admin-bar.php
index 8ee6d1cf20..1b8f8b3391 100644
--- a/wp-includes/class-wp-admin-bar.php
+++ b/wp-includes/class-wp-admin-bar.php
@@ -196,7 +196,8 @@ class WP_Admin_Bar {
 
 	public function render() {
 		$root = $this->_bind();
-		$this->_render( $root );
+		if ( $root )
+			$this->_render( $root );
 	}
 
 	final protected function _bind() {