From 2c7742e56fd26aaa96bf82d619298b0e0994a86f Mon Sep 17 00:00:00 2001
From: Rob Garrison <wowmotty@gmail.com>
Date: Tue, 18 Sep 2018 08:14:00 -0500
Subject: [PATCH] Check for null in isNumber

---
 manage/config-dialog.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/manage/config-dialog.js b/manage/config-dialog.js
index d638de1f..1eb27b03 100644
--- a/manage/config-dialog.js
+++ b/manage/config-dialog.js
@@ -198,7 +198,7 @@ function configDialog(style) {
   }
 
   function isNumber(value) {
-    return value !== '' && !isNaN(Number(value));
+    return value !== null && value !== '' && !isNaN(Number(value));
   }
 
   function isDefault(va) {