build

malloc: remove return from void functions #194

Job	Run time
ubuntu-20.04-gcc-static	21m 47s
ubuntu-20.04-gcc-shared-mini	2m 58s
ubuntu-20.04-gcc-shared-abi+doc+tests	23m 18s
ubuntu-20.04-clang-static	9m 52s
ubuntu-20.04-clang-shared-doc+tests	12m 15s
ubuntu-20.04-gcc-static-i386	8m 7s
ubuntu-20.04-gcc-static-aarch64	4m 36s
ubuntu-20.04-gcc-shared-aarch64	4m 36s
ubuntu-20.04-gcc-static-ppc64le	14m 30s
ubuntu-20.04-gcc-shared-ppc64le	10m 39s
	1h 52m 38s

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