Add void signature for C functions without parameters. #2

Job	Run time
nmake workflow	10m 4s
autoconf workflow using Default	3m 8s
autoconf workflow using LLVM	3m 0s
autoconf workflow using Debug	4m 59s
autoconf workflow using Profiling	13m 6s
autoconf workflow using Address Sanitition	5m 52s
autoconf workflow using Thread Sanitition	2m 41s
autoconf workflow using No Optimization	3m 41s
autoconf workflow using Native Optimization	3m 11s
autoconf workflow using Static Library	3m 8s
autoconf workflow using zlib	3m 52s
autoconf workflow using zstd	3m 12s
autoconf workflow using lz4	3m 10s
autoconf workflow using lzma	3m 5s
autoconf workflow using most features	3m 10s
	1h 9m 19s

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