From 09c6d5c4f8ad305c787a9c2208a0501b32c2304e Mon Sep 17 00:00:00 2001
From: Svein-Tore Griff With <s.t.g.with@gmail.com>
Date: Tue, 14 Apr 2015 14:01:28 +0200
Subject: [PATCH] Handle cases where a field don't have params

---
 js/h5p-content-upgrade-process.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/js/h5p-content-upgrade-process.js b/js/h5p-content-upgrade-process.js
index e86a66a..94a6809 100644
--- a/js/h5p-content-upgrade-process.js
+++ b/js/h5p-content-upgrade-process.js
@@ -193,12 +193,14 @@ H5P.ContentUpgradeProcess = (function (Version) {
         else {
           // Go through all fields in the group
           asyncSerial(field.fields, function (index, subField, next) {
-            self.processField(subField, params[subField.name], function (err, upgradedParams) {
+            var paramsToProcess = params ? params[subField.name] : null;
+            self.processField(subField, paramsToProcess, function (err, upgradedParams) {
               if (upgradedParams) {
                 params[subField.name] = upgradedParams;
               }
               next(err);
             });
+            
           }, function (err) {
             done(err, params);
           });