From 4c8566470355d3afb4badabf67d3778158bb270f Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov.ru@gmail.com>
Date: Tue, 12 Mar 2013 01:50:46 +0000
Subject: [PATCH] Avoid an undefined index notice in
 get_post_type_archive_feed_link(). props ericlewis. fixes #23744.

git-svn-id: http://core.svn.wordpress.org/trunk@23660 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/link-template.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/wp-includes/link-template.php b/wp-includes/link-template.php
index 9412db49e5..1daf48779c 100644
--- a/wp-includes/link-template.php
+++ b/wp-includes/link-template.php
@@ -867,9 +867,10 @@ function get_post_type_archive_feed_link( $post_type, $feed = '' ) {
 
 	if ( ! $link = get_post_type_archive_link( $post_type ) )
 		return false;
+
 	$post_type_obj = get_post_type_object( $post_type );
-	if ( $post_type_obj->rewrite['feeds'] && get_option( 'permalink_structure' ) ) {
-		$link = trailingslashit($link);
+	if ( get_option( 'permalink_structure' ) && is_array( $post_type_obj->rewrite ) && $post_type_obj->rewrite['feeds'] ) {
+		$link = trailingslashit( $link );
 		$link .= 'feed/';
 		if ( $feed != $default_feed )
 			$link .= "$feed/";