From 0d316279ec8504bbd1849625ba019ef952c2da9a Mon Sep 17 00:00:00 2001
From: Troy Stanger <stanger@zumero.com>
Date: Wed, 7 Nov 2018 10:41:29 -0600
Subject: [PATCH] Fix incorrect style when AddUrl is passed null

---
 Ooui/Style.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Ooui/Style.cs b/Ooui/Style.cs
index 3460e22..1d41705 100644
--- a/Ooui/Style.cs
+++ b/Ooui/Style.cs
@@ -432,6 +432,8 @@ namespace Ooui
         }
         static string AddUrl(object val)
         {
+            if (val == null)
+                return null;
             return String.Format("url('{0}')", val);
         }