dispose content stream with StaticRemoteStreamWriter

MediaBrowser.Api/Playback/StaticRemoteStreamWriter.cs

@@ -39,8 +39,11 @@ namespace MediaBrowser.Api.Playback
         /// </summary>
         /// <param name="responseStream">The response stream.</param>
         public void WriteTo(Stream responseStream)
+        {
+            using (_response)
             {
                 _response.Content.CopyTo(responseStream, 819200);
             }
         }
     }
+}