fix: partial return on POS invoice

(cherry picked from commit 76289fa)

# Conflicts:
#	erpnext/accounts/doctype/pos_invoice/pos_invoice.py

erpnext/accounts/doctype/pos_invoice/pos_invoice.py

@@ -381,8 +381,14 @@ def validate_payment_amount(self):
 
 		if self.is_return:
 			invoice_total = self.rounded_total or self.grand_total
+<<<<<<< HEAD
 			if total_amount_in_payments and total_amount_in_payments < invoice_total:
 				frappe.throw(_("Total payments amount can't be greater than {}").format(-invoice_total))
+=======
+			total_amount_in_payments = flt(total_amount_in_payments, self.precision("grand_total"))
+			if total_amount_in_payments and total_amount_in_payments > invoice_total:
+				frappe.throw(_("Total payments amount can't be greater than {}").format(invoice_total))
+>>>>>>> 76289fa8dc (fix: partial return on POS invoice)
 
 	def validate_company_with_pos_company(self):
 		if self.company != frappe.db.get_value("POS Profile", self.pos_profile, "company"):