From c50eaee3d32313a7818bbb1db5404289b535d9c1 Mon Sep 17 00:00:00 2001
From: Peter Westwood <westi@git.wordpress.org>
Date: Thu, 11 Mar 2010 21:58:17 +0000
Subject: [PATCH] Fix a possible undefined offset warning in do_action. Fixes
 #11241 props chrisbliss18.

git-svn-id: https://develop.svn.wordpress.org/trunk@13674 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/plugin.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wp-includes/plugin.php b/wp-includes/plugin.php
index 3a9c507a6d..bb41bd0ad7 100644
--- a/wp-includes/plugin.php
+++ b/wp-includes/plugin.php
@@ -321,7 +321,7 @@ function do_action($tag, $arg = '') {
 	}
 
 	$args = array();
-	if ( is_array($arg) && 1 == count($arg) && is_object($arg[0]) ) // array(&$this)
+	if ( is_array($arg) && 1 == count($arg) && isset($arg[0]) && is_object($arg[0]) ) // array(&$this)
 		$args[] =& $arg[0];
 	else
 		$args[] = $arg;