Fixed error with undefined constant FORUM_DATABASE_QUERY_MAXIMUM_LENG…

…TH in db_update.php.

admin/db_update.php

@@ -26,6 +26,8 @@
 
 define('FORUM_ROOT', '../');
 
+require FORUM_ROOT.'include/constants.php';
+
 // Attempt to load the configuration file config.php
 if (file_exists(FORUM_ROOT.'config.php'))
 	include FORUM_ROOT.'config.php';
@@ -42,12 +44,6 @@
 if (!defined('FORUM_DEBUG'))
 	define('FORUM_DEBUG', 1);
 
-// Define avatars type
-define('FORUM_AVATAR_NONE', 0);
-define('FORUM_AVATAR_GIF', 1);
-define('FORUM_AVATAR_JPG', 2);
-define('FORUM_AVATAR_PNG', 3);
-
 // Turn on full PHP error reporting
 error_reporting(E_ALL);