Notice: Undefined index: Standard Single Room in _rooms_booking_manager_get_unit_type_labels()

Hello,

In a fresh install I created some Bookable Unit Types and afterwards I went to /booking page (without adding any Bookable Unit) and I saw the bellow Notices:

Notice: Undefined index: Standard Single Room in _rooms_booking_manager_get_unit_type_labels() (line 286 ...sites/all/modules/rooms/modules/rooms_booking_manager/rooms_booking_manager.availability_search.inc).
Notice: Trying to get property of non-object in _rooms_booking_manager_get_unit_type_labels() (line 286 ...sites/all/modules/rooms/modules/rooms_booking_manager/rooms_booking_manager.availability_search.inc).

I don't know if this is has to do with my setup or a general bug.

A possible solution might be changing the lines 285-287 in _rooms_booking_manager_get_unit_type_labels() function:

  foreach ($unit_type_ids as $label) {
    $unit_type_labels[$label] = $unit_types[$label]->label;
  }

with this

  foreach ($unit_type_ids as $key => $label) {
    $unit_type_labels[$key] = $unit_types[$key]->label;
  }

P.S. The $unit_type_ids variable has already the information the function returns...?