From 315117b029e09ef30bd122188f797d0497a6c1c9 Mon Sep 17 00:00:00 2001
From: Francis Lachapelle <flachapelle@inverse.ca>
Date: Tue, 10 May 2016 21:18:51 -0400
Subject: [PATCH] (js) Check for undefined message flags

---
 UI/WebServerResources/js/Mailer/MessageController.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/UI/WebServerResources/js/Mailer/MessageController.js b/UI/WebServerResources/js/Mailer/MessageController.js
index 6c64d1597..ab68ca9b1 100644
--- a/UI/WebServerResources/js/Mailer/MessageController.js
+++ b/UI/WebServerResources/js/Mailer/MessageController.js
@@ -66,9 +66,11 @@
     else {
       // Flatten new tags when coming from the predefined list of tags (Message.$tags) and
       // sync tags with server when adding or removing a tag.
-      $scope.$watchCollection('viewer.message.flags', function(newTags, oldTags) {
-        var tags;
-        if (newTags || oldTags) {
+      $scope.$watchCollection('viewer.message.flags', function(_newTags, _oldTags) {
+        var newTags, oldTags, tags;
+        if (_newTags || _oldTags) {
+          newTags = _newTags || [];
+          oldTags = _oldTags || [];
           _.forEach(newTags, function(tag, i) {
             if (angular.isObject(tag))
               newTags[i] = tag.name;