Serialization for LayerTypeDownloadSectionResponse

Now I stumbled across another issue, that is nearly the same priority as above named point 1.
Let's call it 1b): The message layering for LayerTypeDownloadSectionResponse seems not to work and just returns nil. So it looks like some issue in the DownloadSectionResponse decoding.
Also the messagetypes_test fails if enabled for this sequence, e.g. for this message:
goodMessage := "0022340a000700011f0000000000000000000000000000000000000000000000000000000000000000000028"
(with modified check on TID 0x22)