From 1df2b37bc5b3f66ed38d53d4a12b96f1d3a4fb9a Mon Sep 17 00:00:00 2001
From: Tanner Linsley <tannerlinsley@gmail.com>
Date: Thu, 30 Apr 2015 15:49:52 -0600
Subject: [PATCH] Only draw positive radius arcs Fixes #592

---
 src/Chart.Core.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Chart.Core.js b/src/Chart.Core.js
index f6a6995be..2e26a8abb 100755
--- a/src/Chart.Core.js
+++ b/src/Chart.Core.js
@@ -1293,9 +1293,9 @@
 
 			ctx.beginPath();
 
-			ctx.arc(this.x, this.y, this.outerRadius, this.startAngle, this.endAngle);
+			ctx.arc(this.x, this.y, this.outerRadius < 0 ? 0 : this.outerRadius, this.startAngle, this.endAngle);
 
-			ctx.arc(this.x, this.y, this.innerRadius, this.endAngle, this.startAngle, true);
+            ctx.arc(this.x, this.y, this.innerRadius < 0 ? 0 : this.innerRadius, this.endAngle, this.startAngle, true);
 
 			ctx.closePath();
 			ctx.strokeStyle = this.strokeColor;