fix: Ensure paid_amount is always numeric before calling allocate_amount_to_references (backport #50935) (#52035)

fix: Ensure paid_amount is always numeric before calling allocate_amount_to_references (#50935)

fix: ensure paid_amount is not null in allocate_party_amount_against_ref_docs
(cherry picked from commit 50b3396)

Co-authored-by: El-Shafei H. <el.shafei.developer@gmail.com>

Author: mergify[bot]

erpnext/accounts/doctype/payment_entry/payment_entry.js

@@ -1119,7 +1119,7 @@ frappe.ui.form.on("Payment Entry", {
 
 	allocate_party_amount_against_ref_docs: async function (frm, paid_amount, paid_amount_change) {
 		await frm.call("allocate_amount_to_references", {
-			paid_amount: paid_amount,
+			paid_amount: flt(paid_amount),
 			paid_amount_change: paid_amount_change,
 			allocate_payment_amount: frappe.flags.allocate_payment_amount ?? false,
 		});