bug#50988: 26.3; gnus-cloud gets wrong chunk byte count writing sync from windows

[Lars Ingebrigtsen]

sb@dod.no writes:

> The first chunk has the following header:
> (:type :file :file-name "~/.gnus.el" :timestamp
> "2021-09-19T15:04:33+0200" :length 16241)
>
> The byte count here is 16241, but it should have been 15754.

I'm not able to reproduce this exactly, but I think I've identified a
possible problem in this area now.  Do you still see these issues on the
current "master" branch?