fix bug in events.php

apps/calendar/ajax/events.php

@@ -21,7 +21,7 @@ if(is_numeric($calendar['userid']) && $calendar['userid'] != OCP\User::getUser){
 $start = (version_compare(PHP_VERSION, '5.3.0', '>='))?DateTime::createFromFormat('U', $_GET['start']):new DateTime('@' . $_GET['start']);
 $end = (version_compare(PHP_VERSION, '5.3.0', '>='))?DateTime::createFromFormat('U', $_GET['end']):new DateTime('@' . $_GET['end']);
 
-$events = OC_Calendar_App::getrequestedEvents($id, $start, $end);
+$events = OC_Calendar_App::getrequestedEvents($calendar['id'], $start, $end);
 
 $output = array();
 foreach($events as $event){