From cce5b4ca1f849283e75307f42bfe55fece75b553 Mon Sep 17 00:00:00 2001
From: Henning Stahlke <github@henningstahlke.de>
Date: Tue, 4 Dec 2018 14:47:20 +0100
Subject: [PATCH] canvas/gui.nas prevent runtime error

---
 Nasal/canvas/gui.nas | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Nasal/canvas/gui.nas b/Nasal/canvas/gui.nas
index f182f2c40..bc23a9554 100644
--- a/Nasal/canvas/gui.nas
+++ b/Nasal/canvas/gui.nas
@@ -109,9 +109,10 @@ var Window = {
         me._canvas.del();
       me._canvas = nil;
     }
-
-    me._node.remove();
-    me._node = nil;
+    if (me._node != nil) {
+      me._node.remove();
+      me._node = nil;
+    }
   },
   setTitle: func(title)
   {