Stock change logic on pay submit should be outside the form values for customer

In commerce_pos.transaction.inc::commerce_pos_transaction_pay_submit(), there is logic to add a value to the line item's data:

  if (module_exists('commerce_pos_stock')) {
    $order = commerce_order_load($form_state['transaction']->orderId);
    $order_wrapper = entity_metadata_wrapper('commerce_order', $order);
    foreach ($order_wrapper->commerce_line_items->value() as $line_item) {
      if (!empty($form_state['input']['return_line_items'][$line_item->line_item_id]['commerce_pos_stock_add_to_stock'])) {
        $line_item->data['commerce_pos_stock_add_to_stock'] = $form_state['input']['return_line_items'][$line_item->line_item_id]['commerce_pos_stock_add_to_stock'];
        commerce_line_item_save($line_item);
      }
    }
  }

However, this is inside the block checking if the customer exists in the form state values:

  if (!empty($form_state['values']['transaction_options']['customer'])) {

I'm not sure if the customer will always exist in the form state, but either way, the stock change shouldn't rely on it.