fix: provide initial value for .reduce() call

Fixes the error "TypeError: Reduce of empty array with no initial value" (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Reduce_of_empty_array_with_no_initial_value#invalid_cases)

(cherry picked from commit 65f80abf2f)

erpnext/accounts/doctype/sales_invoice/sales_invoice.js

@@ -157,7 +157,7 @@ erpnext.accounts.SalesInvoiceController = class SalesInvoiceController extends (
 
 				const payment_is_overdue = doc.payment_schedule
 					.map((row) => Date.parse(row.due_date) < Date.now())
-					.reduce((prev, current) => prev || current);
+					.reduce((prev, current) => prev || current, false);
 
 				if (payment_is_overdue) {
 					this.frm.add_custom_button(