From: Dan Vanderkam <danvdk@gmail.com>
Date: Sat, 23 Oct 2010 06:13:20 +0000 (-0400)
Subject: pull in ron's patch
X-Git-Tag: v1.0.0~620
X-Git-Url: https://adrianiainlam.tk/git/?a=commitdiff_plain;h=b304aaecb6728af27bc6f7e2b553570556e85e45;p=dygraphs.git

pull in ron's patch
---

diff --git a/dygraph-canvas.js b/dygraph-canvas.js
index 0aa7ca1..c6c5b1e 100644
--- a/dygraph-canvas.js
+++ b/dygraph-canvas.js
@@ -347,15 +347,15 @@ DygraphCanvasRenderer.prototype.clear = function() {
 
   for (var i = 0; i < this.xlabels.length; i++) {
     var el = this.xlabels[i];
-    el.parentNode.removeChild(el);
+    if (el.parentNode) el.parentNode.removeChild(el);
   }
   for (var i = 0; i < this.ylabels.length; i++) {
     var el = this.ylabels[i];
-    el.parentNode.removeChild(el);
+    if (el.parentNode) el.parentNode.removeChild(el);
   }
   for (var i = 0; i < this.annotations.length; i++) {
     var el = this.annotations[i];
-    el.parentNode.removeChild(el);
+    if (el.parentNode) el.parentNode.removeChild(el);
   }
   this.xlabels = new Array();
   this.ylabels = new Array();