From 956e192b6e6fe4524a2b4846f8c4bb1ab8df32e2 Mon Sep 17 00:00:00 2001
From: Stewart Allen <stewart.allen@gmail.com>
Date: Thu, 7 Dec 2017 07:07:51 -0500
Subject: [PATCH] fix empty slice bug with wipes

---
 js/kiri-print.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/js/kiri-print.js b/js/kiri-print.js
index b741ad0b..2e56748b 100644
--- a/js/kiri-print.js
+++ b/js/kiri-print.js
@@ -372,6 +372,8 @@ var gs_kiri_print = exports;
             z = slice.z;
 
         function outputWipe(poly) {
+            if (!poly) return;
+
             var closest = poly.findClosestPointTo(startPoint),
                 distance = wipeDistance,
                 last = startPoint;