[banshee] [Services] Refactoring to avoid hardcoding a type

[Andrés Aragoneses <aaragoneses src gnome org>]

commit d3d172db86ef46dd834ea07bac0b38858ae704f2
Author: Andrés G. Aragoneses <knocte gmail com>
Date:   Thu Sep 9 04:31:03 2010 +0200

    [Services] Refactoring to avoid hardcoding a type
    
    Using Type.IsAssignableFrom() instead of Type.GetInterface(). This
    way we ensure that this is always checked by the compiler, so the
    error would be caught in case the interface type gets renamed or
    its namespace is changed.
    
    Signed-off-by: Alexander Kojevnikov <alexander kojevnikov com>

 .../Banshee.ServiceStack/ServiceManager.cs         |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/Core/Banshee.Services/Banshee.ServiceStack/ServiceManager.cs b/src/Core/Banshee.Services/Banshee.ServiceStack/ServiceManager.cs
index 9e05bb8..ed06669 100644
--- a/src/Core/Banshee.Services/Banshee.ServiceStack/ServiceManager.cs
+++ b/src/Core/Banshee.Services/Banshee.ServiceStack/ServiceManager.cs
@@ -352,7 +352,7 @@ namespace Banshee.ServiceStack
             lock (self_mutex) {
                 Type type = typeof (T);
                 T service = Get (type.Name) as T;
-                if (service == null && type.GetInterface ("Banshee.ServiceStack.IRegisterOnDemandService") != null) {
+                if (service == null && typeof(IRegisterOnDemandService).IsAssignableFrom (type)) {
                     return RegisterService (type) as T;
                 }