In `_wp_menu_output()`, `$submenu_items` is an array and should be initialized as such.

props ipm-frommen.
fixes #31257.
Built from https://develop.svn.wordpress.org/trunk@31364


git-svn-id: http://core.svn.wordpress.org/trunk@31345 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/menu-header.php

@@ -60,7 +60,7 @@ function _wp_menu_output( $menu, $submenu, $submenu_as_parent = true ) {
 			$first = false;
 		}
 
-		$submenu_items = false;
+		$submenu_items = array();
 		if ( ! empty( $submenu[$item[2]] ) ) {
 			$class[] = 'wp-has-submenu';
 			$submenu_items = $submenu[$item[2]];

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-alpha-31363';
+$wp_version = '4.2-alpha-31364';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.