From bf49485d4c08103924e55a181526213267b814bf Mon Sep 17 00:00:00 2001
From: Nick O'Leary <nick.oleary@gmail.com>
Date: Sun, 11 May 2014 13:57:54 +0100
Subject: [PATCH] Handle null TouchEvent (FF/Safari)

---
 public/red/ui/view.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/public/red/ui/view.js b/public/red/ui/view.js
index 5e154b39f..879a2f47e 100644
--- a/public/red/ui/view.js
+++ b/public/red/ui/view.js
@@ -668,7 +668,7 @@ RED.view = function() {
     function portMouseUp(d,portType,portIndex) {
         document.body.style.cursor = "";
         if (mouse_mode == RED.state.JOINING && mousedown_node) {
-            if (d3.event instanceof TouchEvent) {
+            if (typeof TouchEvent != "undefined" && d3.event instanceof TouchEvent) {
                 RED.nodes.eachNode(function(n) {
                         if (n.z == activeWorkspace) {
                             var hw = n.w/2;