zlib: validate write_result array length #2276

Job	Run time
Build slim tarball	1m 36s
aarch64-darwin: with shared libraries	29m 47s
aarch64-linux: with shared libraries	22m 2s
x86_64-linux: with shared libraries	27m 13s
x86_64-darwin: with shared libraries	43m 27s
	2h 4m 5s

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