In `Custom_Background`, declare `$updated` as a property.

See #30224.

Built from https://develop.svn.wordpress.org/trunk@30186


git-svn-id: http://core.svn.wordpress.org/trunk@30186 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/custom-background.php

@@ -42,6 +42,11 @@ class Custom_Background {
 	 */
 	private $page = '';
 
+	/**
+	 * @var bool
+	 */
+	private $updated;
+
 	/**
 	 * Constructor - Register administration header callback.
 	 *

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.1-alpha-30185';
+$wp_version = '4.1-alpha-30186';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.