From 0e5b86a90f0498905a45718bf5fd9f92e6502057 Mon Sep 17 00:00:00 2001
From: Martin Edenhofer <me@edenhofer.de>
Date: Sun, 4 Aug 2013 23:55:41 +0200
Subject: [PATCH] Added check, only add updated_by_id if exists.

---
 lib/session.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/session.rb b/lib/session.rb
index 01a9ec569..3de47a39c 100644
--- a/lib/session.rb
+++ b/lib/session.rb
@@ -824,7 +824,9 @@ class ClientState
     self.user( ticket['owner_id'], users )
     self.user( ticket['customer_id'], users )
     self.user( ticket['created_by_id'], users )
-    self.user( ticket['updated_by_id'], users )
+    if ticket['updated_by_id']
+      self.user( ticket['updated_by_id'], users )
+    end
   end
 
   # add user if needed