[banshee] PlayerEngine: inherit from IDisposable

[Andrés Aragoneses <aaragoneses src gnome org>]

commit d6bf48da27e4e2dd34f1630db37a2a5649ba183d
Author: Andrés G. Aragoneses <knocte gmail com>
Date:   Wed Oct 9 16:37:34 2013 +0200

    PlayerEngine: inherit from IDisposable
    
    PlayerEngine class has a Dispose() method so it should inherit
    from IDisposable.

 .../Banshee.MediaEngine/PlayerEngine.cs            |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/Core/Banshee.Services/Banshee.MediaEngine/PlayerEngine.cs 
b/src/Core/Banshee.Services/Banshee.MediaEngine/PlayerEngine.cs
index d323b9e..de0f525 100644
--- a/src/Core/Banshee.Services/Banshee.MediaEngine/PlayerEngine.cs
+++ b/src/Core/Banshee.Services/Banshee.MediaEngine/PlayerEngine.cs
@@ -38,7 +38,7 @@ using Banshee.ServiceStack;
 
 namespace Banshee.MediaEngine
 {
-    public abstract class PlayerEngine
+    public abstract class PlayerEngine : IDisposable
     {
         public const int VolumeDelta = 10;
         public const int SkipDelta = 10;