From d29444fa079d95475dc831f34bbfc379f1004c02 Mon Sep 17 00:00:00 2001
From: YUKI Hiroshi <shimoda@clear-code.com>
Date: Thu, 3 Apr 2014 12:21:16 +0900
Subject: [PATCH] Update library

---
 modules/lib/inherit.jsm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/lib/inherit.jsm b/modules/lib/inherit.jsm
index 4501a153..22d14e73 100644
--- a/modules/lib/inherit.jsm
+++ b/modules/lib/inherit.jsm
@@ -1,7 +1,7 @@
 /**
  * @fileOverview inherit, an alternative for __proto__
  * @author       YUKI "Piro" Hiroshi
- * @version      1
+ * @version      2
  *
  * @license
  *   The MIT License, Copyright (c) 2014 YUKI "Piro" Hiroshi.
@@ -22,6 +22,7 @@ function toPropertyDescriptors(aProperties) {
 
 function inherit(aParent, aExtraProperties) {
 	if (!Object.create) {
+		aExtraProperties = aExtraProperties || {};
 		aExtraProperties.__proto__ = aParent;
 		return aExtraProperties;
 	}