From 2a116dfdb0d85d10a4dc4c426c0cd3cce0a785af Mon Sep 17 00:00:00 2001
From: Soreine <nicolas@gitbook.com>
Date: Mon, 11 Jul 2016 15:14:29 +0200
Subject: [PATCH] Fix reducedObject when default property is undefined

---
 lib/utils/reducedObject.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/utils/reducedObject.js b/lib/utils/reducedObject.js
index fa5d32cc1..7bcfd5b1b 100644
--- a/lib/utils/reducedObject.js
+++ b/lib/utils/reducedObject.js
@@ -4,8 +4,13 @@ var Immutable = require('immutable');
  *  Reduce the difference between a map and its default version
  *  @param {Map} defaultVersion
  *  @param {Map} currentVersion
+ *  @return {Map} The properties of currentVersion that differs from defaultVersion
  */
 function reducedObject(defaultVersion, currentVersion) {
+    if(defaultVersion === undefined) {
+        return currentVersion;
+    }
+
     return currentVersion.reduce(function(result, value, key) {
         var defaultValue = defaultVersion.get(key);