fix wrong variable

includes/model/NeededAngelTypes_model.php

@@ -88,6 +88,7 @@ function NeededAngelTypes_by_shift($shiftId) {
   foreach ($needed_angeltypes_source as $angeltype) {
     $shift_entries = ShiftEntries_by_shift_and_angeltype($shiftId, $angeltype['angel_type_id']);
     
+    // TODO: Substract shift entries which are freeloader
     $angeltype['taken'] = count($shift_entries);
     $angeltype['shift_entries'] = $shift_entries;
     $needed_angeltypes[] = $angeltype;

includes/model/Shifts_model.php

@@ -101,7 +101,7 @@ function Shift_occupied($shift_id, $angeltype_id) {
   $needed_angeltypes = NeededAngelTypes_by_shift($shift_id);
   
   foreach ($needed_angeltypes as $needed_angeltype) {
-    if ($needed_angeltype['angel_type_id'] == $angeltype['id']) {
+    if ($needed_angeltype['angel_type_id'] == $angeltype_id) {
       return $needed_angeltype['taken'] < $needed_angeltype['count'];
     }
   }
@@ -113,8 +113,11 @@ function Shift_occupied($shift_id, $angeltype_id) {
  * Check if an angel can sign up for given shift.
  *
  * @param Shift $shift
+ *          The shift
  * @param AngelType $angeltype
+ *          The angeltype to which the user wants to sign up
  * @param array<Shift> $user_shifts
+ *          List of the users shifts
  */
 function Shift_signup_allowed($shift, $angeltype, $user_angeltype = null, $user_shifts = null) {
   global $user, $privileges;