From 8ff0cb38860fe4a420172de970310995aee13edf Mon Sep 17 00:00:00 2001
From: nightwing <amirjanyan@gmail.com>
Date: Thu, 9 Nov 2017 17:16:43 +0000
Subject: [PATCH] fix error in flexbor.destroy

---
 plugins/c9.ide.ui/lib/flexbox.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plugins/c9.ide.ui/lib/flexbox.js b/plugins/c9.ide.ui/lib/flexbox.js
index ff58b45b..821ce620 100644
--- a/plugins/c9.ide.ui/lib/flexbox.js
+++ b/plugins/c9.ide.ui/lib/flexbox.js
@@ -634,6 +634,8 @@ apf.vbox = function(struct, tagName) {
     this.unregister = function(amlNode) {
         if (!amlNode.$propHandlers)
             return;
+            
+        if (!amlNode.$ext) return;
         
         amlNode.$propHandlers["left"] = 
         amlNode.$propHandlers["top"] =