Fixes DirectStreaming for Microsoft players

MediaBrowser.Server.Implementations/HttpServer/RangeRequestWriter.cs

@@ -178,19 +178,8 @@ namespace MediaBrowser.Server.Implementations.HttpServer
 
             using (var source = SourceStream)
             {
-                // If the requested range is "0-", we can optimize by just doing a stream copy
-                if (RangeEnd == TotalContentLength - 1)
-                {
-                    await source.CopyToAsync(responseStream).ConfigureAwait(false);
-                }
-                else
-                {
-                    // Read the bytes we need
-                    var buffer = new byte[Convert.ToInt32(RangeLength)];
-                    await source.ReadAsync(buffer, 0, buffer.Length).ConfigureAwait(false);
-
-                    await responseStream.WriteAsync(buffer, 0, Convert.ToInt32(RangeLength)).ConfigureAwait(false);
-                }
+                //Since we've already set the postion of the sourcestream, just copy the remains to the output
+                await source.CopyToAsync(responseStream).ConfigureAwait(false);
             }
         }