Load the new admin and network admin mo files, if present. see #19852

git-svn-id: http://svn.automattic.com/wordpress/trunk@19772 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/admin.php

@@ -6,6 +6,13 @@
  * @subpackage Administration
  */
 
+if ( ! defined('WP_ADMIN') ) {
+	// This file is being included from a file other than wp-admin/admin.php, so
+	// some setup was skipped. Make sure the admin message catalog is loaded since
+	// load_default_textdomain() will not have done so in this context.
+	load_textdomain( 'default', WP_LANG_DIR . '/admin-' . get_locale() . '.mo' );
+}
+
 /** WordPress Bookmark Administration API */
 require_once(ABSPATH . 'wp-admin/includes/bookmark.php');