From f9068fe7d179c204a24275696ff2f039f23c6c52 Mon Sep 17 00:00:00 2001
From: Artur Arseniev <artur.catch@hotmail.it>
Date: Wed, 3 Oct 2018 07:48:29 +0200
Subject: [PATCH] Fix extend properties in Sector

---
 src/style_manager/model/Sector.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/style_manager/model/Sector.js b/src/style_manager/model/Sector.js
index b61487b13..8e52ad3c3 100644
--- a/src/style_manager/model/Sector.js
+++ b/src/style_manager/model/Sector.js
@@ -53,7 +53,7 @@ module.exports = Backbone.Model.extend({
           var mPProps = mProp.properties;
           if (mPProps && mPProps.length) {
             mProp.properties = this.extendProperties(
-              prop.properties,
+              prop.properties || [],
               mPProps,
               1
             );