From 6847f6d7ebebceb457e42987d5dd587ac14993f4 Mon Sep 17 00:00:00 2001
From: Nicholas Mayne <Jetski5822@gmail.com>
Date: Tue, 15 Jul 2014 21:13:22 +0100
Subject: [PATCH] Fixing comparison where either side can be null

---
 src/Orchard/ContentManagement/Drivers/ContentPartDriver.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Orchard/ContentManagement/Drivers/ContentPartDriver.cs b/src/Orchard/ContentManagement/Drivers/ContentPartDriver.cs
index a26be082a..902e7e455 100644
--- a/src/Orchard/ContentManagement/Drivers/ContentPartDriver.cs
+++ b/src/Orchard/ContentManagement/Drivers/ContentPartDriver.cs
@@ -76,7 +76,7 @@ namespace Orchard.ContentManagement.Drivers {
                         return editor;
                     }
 
-                    if (editor.GetGroup() != context.GroupId) {
+                    if ((editor.GetGroup() ?? string.Empty) != (context.GroupId ?? string.Empty)) {
                         return editor;
                     }
                 }