From 6a673c03b424ed80d411ab0b10ab74ba4d74239b Mon Sep 17 00:00:00 2001
From: Andy Dufilie <andrew.dufilie@iweave.com>
Date: Wed, 1 Jun 2016 17:32:27 -0400
Subject: [PATCH] added check for null in c3_chart_internal_fn.expandArc

---
 src/arc.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/arc.js b/src/arc.js
index 5abcdde..de1bcf0 100644
--- a/src/arc.js
+++ b/src/arc.js
@@ -143,7 +143,7 @@ c3_chart_internal_fn.expandArc = function (targetIds) {
         interval = window.setInterval(function () {
             if (!$$.transiting) {
                 window.clearInterval(interval);
-                if ($$.legend.selectAll('.c3-legend-item-focused').size() > 0) {
+                if ($$.legend && $$.legend.selectAll('.c3-legend-item-focused').size() > 0) {
                     $$.expandArc(targetIds);
                 }
             }