[FIX] credit calculation

src/components/steps/PaymentAmount.vue

@@ -52,6 +52,10 @@
 
                     this.changeInitialPayment(value)
                     this.computePaymentResidual(value)
+
+                    if (this.paymentType === 'credit') {
+                       this.computePaymentLines()		
+                    }
                 }
             },
             ...mapGetters([