From 540aaf0672eeed268224e912f63d36f147595348 Mon Sep 17 00:00:00 2001
From: James Allen <james@sharelatex.com>
Date: Thu, 13 Mar 2014 14:30:01 +0000
Subject: [PATCH] Add in some null checks

---
 services/track-changes/app/coffee/DiffGenerator.coffee | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/services/track-changes/app/coffee/DiffGenerator.coffee b/services/track-changes/app/coffee/DiffGenerator.coffee
index c8229b96dc..7f6749dbd4 100644
--- a/services/track-changes/app/coffee/DiffGenerator.coffee
+++ b/services/track-changes/app/coffee/DiffGenerator.coffee
@@ -191,7 +191,7 @@ module.exports = DiffGenerator =
 		return part
 
 	_getLengthOfDiffPart: (part) ->
-		(part.u or part.d or part.i).length
+		(part.u or part.d or part.i or '').length
 
 	_getContentOfPart: (part) ->
-		part.u or part.d or part.i
+		part.u or part.d or part.i or ''