[banshee] u1ms: Guard against a null DBusCommandService

[Bertrand Lorentz <blorentz src gnome org>]

commit 771e8dc86ab05def1e766f5a1e3658cf31408db3
Author: Bertrand Lorentz <bertrand lorentz gmail com>
Date:   Tue Nov 1 21:28:54 2011 +0100

    u1ms: Guard against a null DBusCommandService
    
    This fixes a failure in the unit tests, as DBus is not initialized in
    this case.

 .../UbuntuOneMusicStoreSource.cs                   |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/src/Extensions/Banshee.UbuntuOneMusicStore/Banshee.UbuntuOneMusicStore/UbuntuOneMusicStoreSource.cs b/src/Extensions/Banshee.UbuntuOneMusicStore/Banshee.UbuntuOneMusicStore/UbuntuOneMusicStoreSource.cs
index 6cedff0..b3e332c 100644
--- a/src/Extensions/Banshee.UbuntuOneMusicStore/Banshee.UbuntuOneMusicStore/UbuntuOneMusicStoreSource.cs
+++ b/src/Extensions/Banshee.UbuntuOneMusicStore/Banshee.UbuntuOneMusicStore/UbuntuOneMusicStoreSource.cs
@@ -60,7 +60,10 @@ namespace Banshee.UbuntuOneMusicStore
             }
 
             // So we can handle u1ms:// URIs
-            ServiceManager.Get<DBusCommandService> ().ArgumentPushed += OnCommandLineArgument;
+            var dbus_service = ServiceManager.Get<DBusCommandService> ();
+            if (dbus_service != null) {
+                dbus_service.ArgumentPushed += OnCommandLineArgument;
+            }
 
             // make sure that the u1ms uri gets handled on banshee startup
             foreach (string uri in ApplicationContext.CommandLine.Files) {
@@ -73,7 +76,10 @@ namespace Banshee.UbuntuOneMusicStore
 
         ~UbuntuOneMusicStoreSource ()
         {
-            ServiceManager.Get<DBusCommandService> ().ArgumentPushed -= OnCommandLineArgument;
+            var dbus_service = ServiceManager.Get<DBusCommandService> ();
+            if (dbus_service != null) {
+                dbus_service.ArgumentPushed -= OnCommandLineArgument;
+            }
         }
 
         // A count of 0 will be hidden in the source TreeView