Index: branches/5.2.x/core/units/helpers/multilanguage_helper.php
===================================================================
diff -u -N -r15428 -r16297
--- branches/5.2.x/core/units/helpers/multilanguage_helper.php	(.../multilanguage_helper.php)	(revision 15428)
+++ branches/5.2.x/core/units/helpers/multilanguage_helper.php	(.../multilanguage_helper.php)	(revision 16297)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: multilanguage_helper.php 15428 2012-07-11 13:20:22Z alex $
+* @version	$Id: multilanguage_helper.php 16297 2015-10-25 18:05:13Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -396,7 +396,12 @@
 					// create index for primary language column + for all others (if multiple languages installed)
 					list($field_name, $field_params) = explode(' ', $field_expression, 2);
 
-					$index_type = isset($this->curFields[$ml_field]['index_type']) ? $this->curFields[$prev_field]['index_type'] : 'string';
+					if ( isset($this->curFields[$ml_field]['index_type']) ) {
+						$index_type = $this->curFields[$ml_field]['index_type'];
+					}
+					else {
+						$index_type = 'string';
+					}
 
 					$ret .= $index_type == 'string' ? 'ADD INDEX (`'.$field_name.'` (5) ), ' : 'ADD INDEX (`'.$field_name.'`), ';
 					$this->curIndexCount++;