zlib: validate write_result array length #2218

Job	Run time
Build slim tarball	1m 35s
aarch64-linux: with shared libraries	21m 48s
x86_64-darwin: with shared libraries	45m 37s
x86_64-linux: with shared libraries	25m 36s
aarch64-darwin: with shared libraries	26m 49s
	2h 1m 25s

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