From 54b8932923ffb3fb11c78f7e0c00142700a66a88 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov.ru@gmail.com>
Date: Wed, 24 Feb 2016 01:37:26 +0000
Subject: [PATCH] Widgets: Avoid a PHP notice in `is_dynamic_sidebar()` is a
 sidebar is registered but does not yet have an index in the
 `sidebars_widgets` option.

Props dlh.
Fixes #35928.
Built from https://develop.svn.wordpress.org/trunk@36667


git-svn-id: http://core.svn.wordpress.org/trunk@36634 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/version.php | 2 +-
 wp-includes/widgets.php | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/wp-includes/version.php b/wp-includes/version.php
index 956170e87e..7dc30bc13e 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-36666';
+$wp_version = '4.5-alpha-36667';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-includes/widgets.php b/wp-includes/widgets.php
index b24b465503..ace4571816 100644
--- a/wp-includes/widgets.php
+++ b/wp-includes/widgets.php
@@ -830,7 +830,7 @@ function is_dynamic_sidebar() {
 	global $wp_registered_widgets, $wp_registered_sidebars;
 	$sidebars_widgets = get_option('sidebars_widgets');
 	foreach ( (array) $wp_registered_sidebars as $index => $sidebar ) {
-		if ( count($sidebars_widgets[$index]) ) {
+		if ( ! empty( $sidebars_widgets[ $index ] ) ) {
 			foreach ( (array) $sidebars_widgets[$index] as $widget )
 				if ( array_key_exists($widget, $wp_registered_widgets) )
 					return true;