Adds decimalize pass to CheckoutPricing

Signed-off-by: Christopher Rogers <chrissrogers@gmail.com>

lib/recurly/pricing/checkout/calculations.js

@@ -97,8 +97,12 @@ export default class Calculations {
       .then(() => this.totals())
       .then(() => this.giftCards())
       .then(() => this.itemizedSets())
-      .catch(this.pricing.error)
-      .done(() => done(this.price))
+      .catch(err => this.pricing.error(err))
+      .done(() => {
+        each(this.price.now, decimalizeMember, this.price.now);
+        each(this.price.next, decimalizeMember, this.price.next);
+        done(this.price)
+      });
   }
 
   get validSubscriptions () {

lib/recurly/pricing/index.js

@@ -120,7 +120,7 @@ export class Pricing extends Emitter {
    * @param {[String]} namespace - dot-delimited error namespace
    * @private
    */
-  error (error, reject, namespace) {
+  error (error, reject = () => {}, namespace) {
     if (namespace) {
       namespace.split('.').reduce((memo, name) => this.emit(`${memo}.${name}`, error), 'error');
     }

lib/util/decimalize-member.js

@@ -6,5 +6,6 @@
  */
 
 export default function decimalizeMember (prop) {
+  if (typeof this[prop] !== 'number') return;
   this[prop] = (Math.round(Math.max(this[prop], 0) * 100) / 100).toFixed(2);
 }