add missing parenthesis to reservations.php

php/reservations.php

@@ -446,7 +446,7 @@ function addReservation($q) {
 			"to_event_before" => $q->to_event,
 			"rooms" => array($q->room_id)
 		);
-		$existing_reservations = array_map("unserialize", array_unique(array_map("serialize", array_merge($existing_reservations, getReservationsFiltered(json_decode(json_encode($resv_options), false), true))));
+		$existing_reservations = array_map("unserialize", array_unique(array_map("serialize", array_merge($existing_reservations, getReservationsFiltered(json_decode(json_encode($resv_options), false), true)))));
 
 		if (sizeof($existing_reservations) > 0) {
 			fail("Timeslot already booked");
@@ -479,7 +479,7 @@ function addReservation($q) {
 			"rooms" => array($q->room_id),
 			"confirmed" => 1
 		);
-		$existing_reservations = array_map("unserialize", array_unique(array_map("serialize", array_merge($existing_reservations, getReservationsFiltered(json_decode(json_encode($resv_options), false), true))));
+		$existing_reservations = array_map("unserialize", array_unique(array_map("serialize", array_merge($existing_reservations, getReservationsFiltered(json_decode(json_encode($resv_options), false), true)))));
 
 		if (sizeof($existing_reservations) > 11) {
 			fail("Studyspace overbooked");