use more idiomatic way to create an integer out of a repeating byte

[folkertdev]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Flag	Coverage Δ
fuzz-compress	41.43% <0.00%> (+0.01%)	⬆️
fuzz-decompress	31.06% <0.00%> (-0.07%)	⬇️
test-aarch64-apple-darwin	87.72% <100.00%> (-0.02%)	⬇️
test-x86_64-apple-darwin	86.95% <75.00%> (-0.03%)	⬇️
test-x86_64-unknown-linux-gnu	87.10% <100.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
zlib-rs/src/adler32/avx2.rs	92.59% <100.00%> (+0.09%)	⬆️
zlib-rs/src/crc32/pclmulqdq.rs	100.00% <100.00%> (ø)
zlib-rs/src/deflate.rs	97.02% <ø> (ø)
zlib-rs/src/deflate/compare256.rs	97.97% <100.00%> (-0.06%)	⬇️

... and 2 files with indirect coverage changes

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