Update public search to be more user-friendly

application/modules/courses/models/CourseModel.php

@@ -534,7 +534,7 @@ class Courses_CourseModel extends Unl_Model
 
         $records = $select->query()->fetchAll();
         if (count($records) == 0) {
-            return null;
+            return new Unl_Model_Collection(__CLASS__);;
         }
         $generationIds = array();
         foreach ($records as $record) {