Fix: Add another key for bank rather than to modify one

htdocs/langs/en_US/loan.lang

@@ -3,6 +3,7 @@ Loan=Loan
 Loans=Loans
 NewLoan=New Loan
 ShowLoan=Show Loan
+PaymentLoan=Loan payment
 LoanPayment=Loan payment
 ShowLoanPayment=Show Loan Payment
 LoanCapital=Capital

htdocs/loan/payment/card.php

 <?php
-/* Copyright (C) 2014		Alexandre Spangaro	<aspangaro.dolibarr@gmail.com>
+/* Copyright (C) 2014-2016	Alexandre Spangaro	<aspangaro.dolibarr@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -125,7 +125,7 @@ $head[$h][1] = $langs->trans("Card");
 $hselected = $h;
 $h++;
 
-dol_fiche_head($head, $hselected, $langs->trans("LoanPayment"), 0, 'payment');
+dol_fiche_head($head, $hselected, $langs->trans("PaymentLoan"), 0, 'payment');
 
 /*
  * Confirm deletion of the payment