Small SQL fix in CourseActivities.php

application/models/tables/CourseActivities.php

@@ -47,7 +47,8 @@ class CourseActivities extends Local_Db_CourseTableMany
             $select->from($this->_name, '*');
             $select->join($activityTableName,
                             $this->_name . '.type = '
-                          . $activityTableName . '.shortName');
+                          . $activityTableName . '.shortName',
+                          array());
 
             $select->where($where);
             $select->order(new Zend_Db_Expr($activityTableName . '.' . $activityPrimary));