Merge pull request #5649 from saurabh6790/payment_request_grand_total_fix

[minor][fix] fix base_grand_total in payment request
diff --git a/erpnext/accounts/doctype/payment_request/payment_request.py b/erpnext/accounts/doctype/payment_request/payment_request.py
index f7d9586..a774e54 100644
--- a/erpnext/accounts/doctype/payment_request/payment_request.py
+++ b/erpnext/accounts/doctype/payment_request/payment_request.py
@@ -98,7 +98,7 @@
 		
 		bank_amount = self.grand_total
 		if party_account_currency == ref_doc.company_currency and party_account_currency != self.currency:
-			party_amount = self.base_grand_total
+			party_amount = ref_doc.base_grand_total
 		else:
 			party_amount = self.grand_total