simplify `match` #463

Job	Run time
cargo-c dynamic library	43s
Clippy	15s
QEMU build & test (stable, ubuntu-latest, s390x-unknown-linux-gnu, s390x-linux-gnu-gcc, qemu-s390...	46s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	39s
Clippy (--no-default-features --features="c-allocator")	20s
QEMU build & test (stable, ubuntu-latest, i686-unknown-linux-gnu, i686-linux-gnu-gcc)	28s
Build and test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	40s
Clippy (--no-default-features --features="std,rust-allocator")	17s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	36s
Smoke-test fuzzing targets (ubuntu-20.04, default)	1m 32s
Build and test (stable, macos-latest, x86_64-apple-darwin)	1m 7s
Smoke-test fuzzing targets (ubuntu-20.04, c-allocator)	1m 39s
Build and test (stable, macos-14, aarch64-apple-darwin)	56s
Miri	1m 20s
vanilla dynamic library	18s
Smoke-test fuzzing targets (ubuntu-20.04, rust-allocator)	1m 37s
Build and test (stable-x86_64-gnu, windows-2022, x86_64-pc-windows-gnu)	1m 46s
Smoke-test fuzzing targets (macos-14)	1m 46s
wasm32	30s
run bzip2-rs test suite (x86_64-unknown-linux-gnu)	23s
	17m 38s

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