set dlna responses to utf8

MediaBrowser.Api/Dlna/DlnaServerService.cs

@@ -109,7 +109,7 @@ namespace MediaBrowser.Api.Dlna
         private readonly IMediaReceiverRegistrar _mediaReceiverRegistrar;
 
         // TODO: Add utf-8
-        private const string XMLContentType = "text/xml";
+        private const string XMLContentType = "text/xml; charset=UTF-8";
 
         public DlnaServerService(IDlnaManager dlnaManager, IContentDirectory contentDirectory, IConnectionManager connectionManager, IMediaReceiverRegistrar mediaReceiverRegistrar)
         {