From 7cc303a9049a5acf725ef9bb73f25ae98c059138 Mon Sep 17 00:00:00 2001
From: Welling Guzman <hola@wellingguzman.com>
Date: Fri, 9 Sep 2016 10:35:09 -0400
Subject: [PATCH] Falsy values are accepted as default values, except
 undefined. Fixes #1256

---
 app/core/UIManager.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/core/UIManager.js b/app/core/UIManager.js
index cf96c87935bf5..24bf16c68332e 100644
--- a/app/core/UIManager.js
+++ b/app/core/UIManager.js
@@ -334,7 +334,9 @@ define(function(require, exports, module) {
         var attribute = this.attributes[attr];
         if (this.defaultAttributes && attribute === undefined) {
           var defaultAttribute = this.defaultAttributes[attr];
-          if (defaultAttribute) {
+          // Falsy values are accepted as default values
+          // excepted undefined (#1256)
+          if (defaultAttribute !== undefined) {
             attribute = defaultAttribute;
           }
         }