From 36679a6e89ab14b6ddcd1c1153e57c0b70986831 Mon Sep 17 00:00:00 2001
From: John Blackbourn <johnbillion@git.wordpress.org>
Date: Sat, 12 Dec 2015 01:06:29 +0000
Subject: [PATCH] Avoid a PHP notice when trying to access the `post_parent`
 property of hierarchical post type nav menu items.

FIxes #34446

Built from https://develop.svn.wordpress.org/trunk@35876


git-svn-id: http://core.svn.wordpress.org/trunk@35840 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/class-wp-walker.php | 2 +-
 wp-includes/version.php         | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/wp-includes/class-wp-walker.php b/wp-includes/class-wp-walker.php
index e4890ae5c6..ee68a205e9 100644
--- a/wp-includes/class-wp-walker.php
+++ b/wp-includes/class-wp-walker.php
@@ -215,7 +215,7 @@ class Walker {
 		$top_level_elements = array();
 		$children_elements  = array();
 		foreach ( $elements as $e) {
-			if ( 0 == $e->$parent_field )
+			if ( empty( $e->$parent_field ) )
 				$top_level_elements[] = $e;
 			else
 				$children_elements[ $e->$parent_field ][] = $e;
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 976870b312..4879fd017d 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-35875';
+$wp_version = '4.5-alpha-35876';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.