Inflate cleanups

[folkertdev]

can be reviewed commit-by-commit

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
zlib-rs/src/inflate.rs	91.13% <100.00%> (-0.08%)	⬇️

... and 2 files with indirect coverage changes

[bjorn3]

Did you maybe mean to use "save a needless write to a pointer" without a second "write" as commit message for the second commit?