[FIX] point_of_sale: closing session without cash

The closing session popup input for bank payment methods throws an error when no cash payment method is configured.

Steps to reproduce:
 - Configure a shop without any cash payment method and with at least one bank payment method
 - Open a session for that shop
 - Click on the button to display the closing session popup
 - In the popup, change the amount of the bank payment method

An error is thrown.

The fix simply consists in correctly checking if there is a cash payment method.

closes odoo/odoo#132243

Task-id: 3468828
X-original-commit: 554ccb12a154f30f03c01931dc66eb04394f8154
Signed-off-by: Joseph Caburnay (jcb) <jcb@odoo.com>

addons/point_of_sale/static/src/app/navbar/closing_popup/closing_popup.js

@@ -110,7 +110,7 @@ export class ClosePosPopup extends AbstractAwaitablePopup {
     handleInputChange(paymentId, event) {
         if (event.target.classList.contains('invalid-cash-input')) return;
         let expectedAmount;
-        if (paymentId === this.defaultCashDetails.id) {
+        if (paymentId === this.defaultCashDetails?.id) {
             this.manualInputCashCount = true;
             this.moneyDetails = null;
             this.state.notes = "";