MAGETWO-51181: [GITHUB] Configurable product's last attribute with pr…

…ice zero results in error #3912

 - updated per code review

app/code/Magento/Catalog/view/base/web/js/price-box.js

@@ -184,7 +184,7 @@ define([
                     var type = $(element).data('priceType'),
                         amount = parseFloat($(element).data('priceAmount'));
 
-                    if (type && !isNaN(amount)) {
+                    if (type && !_.isNaN(amount)) {
                         prices[type] = {
                             amount: amount
                         };