Add in null check for user when getting hue in chat

services/web/public/coffee/ide/chat/controllers/ChatMessageController.coffee

@@ -4,5 +4,8 @@ define [
 ], (App, ColorManager) ->
 	App.controller "ChatMessageController", ["$scope", "ide", ($scope, ide) ->
 		$scope.hue = (user) ->
-			ColorManager.getHueForUserId(user.id)
+			if !user?
+				return 0
+			else
+				return ColorManager.getHueForUserId(user.id)
 	]