zlib: fix input validation in crc32 fast path #1832

Job	Run time
Build slim tarball	1m 47s
x86_64-linux: with shared libraries	29m 5s
aarch64-darwin: with shared libraries	22m 14s
aarch64-linux: with shared libraries	23m 39s
x86_64-darwin: with shared libraries	43m 10s
	1h 59m 55s

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