Fixing missing variable

main/inc/lib/result_set.class.php

@@ -5,6 +5,7 @@
  *
  * @license see /license.txt
  * @author Laurent Opprecht <laurent@opprecht.info> for the Univesity of Geneva
+ 
  */
 class ResultSet implements Countable, Iterator
 {
@@ -36,7 +37,7 @@ class ResultSet implements Countable, Iterator
         $this->limit_count = $limit_count;
         $this->limit_offset = $limit_offset;
         $this->orderby_column = $orderby_column;
-        $this->orderby_direction = $direction;
+        $this->orderby_direction = $orderby_direction;
         $this->return_type = $return_type;
     }