From 00af5fc2118908e2205ddcc3945047b335a52ca0 Mon Sep 17 00:00:00 2001
From: Olivier Melcher <olivier.melcher@gmail.com>
Date: Tue, 13 May 2014 14:27:56 -0400
Subject: [PATCH] require d3

---
 c3.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/c3.js b/c3.js
index 7c68cc9..d1362fe 100644
--- a/c3.js
+++ b/c3.js
@@ -76,7 +76,7 @@
      */
     c3.generate = function (config) {
 
-        var d3 = window.d3 ? window.d3 : window.require ? window.require("d3") : undefined;
+        var d3 = window.d3 ? window.d3 : 'undefined' != typeof require ? require("d3") : undefined;
 
         var c3 = { data : {}, axis: {}, legend: {} },
             cache = {};