Code review comment for ~mkukri/ubuntu/+source/zlib:merge

I think this looks good, and is a nice clean-up.

Since this is merged to the noble development release quite early, there should be some time to ask the IBM s390x people to give it a try (I remember that Ilya Leoshkevich <email address hidden> had some test code).

Once I see that this landed, I would like to ask Ilya (no need for you to do anything, but that allows to ensure that the changing s390x optimization patches work fine ...).