From 8b7a0cc362636c7fd76e55f32e74b808886936d0 Mon Sep 17 00:00:00 2001
From: Dan Vanderkam <danvdk@gmail.com>
Date: Sun, 13 Dec 2009 15:00:56 -0800
Subject: [PATCH] Incorporate patch from Mark Swanson

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

diff --git a/dygraph-canvas.js b/dygraph-canvas.js
index 49dddd4..a848001 100644
--- a/dygraph-canvas.js
+++ b/dygraph-canvas.js
@@ -340,7 +340,7 @@ DygraphCanvasRenderer.prototype._renderAxis = function() {
   context.lineWidth = this.options.axisLineWidth;
 
   if (this.options.drawYAxis) {
-    if (this.layout.yticks) {
+    if (this.layout.yticks && this.layout.yticks.length > 0) {
       for (var i = 0; i < this.layout.yticks.length; i++) {
         var tick = this.layout.yticks[i];
         if (typeof(tick) == "function") return;
-- 
2.7.4