From dd0db4d46035198c8c1bf687849a6e090326b8bc Mon Sep 17 00:00:00 2001
From: Pierre Ossman <ossman@cendio.se>
Date: Sat, 14 Oct 2017 13:25:10 +0200
Subject: [PATCH] Allow omitting configuration for properties

---
 core/util/properties.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/util/properties.js b/core/util/properties.js
index e1d607e0..7b08a644 100644
--- a/core/util/properties.js
+++ b/core/util/properties.js
@@ -114,6 +114,7 @@ export function make_properties (constructor, arr) {
 
 export function set_defaults (obj, conf, defaults) {
     var defaults_keys = Object.keys(defaults);
+    conf = conf || {};
     var conf_keys = Object.keys(conf);
     var keys_obj = {};
     var i;