Cleanup: change VOID into void

[magv]

As discussed in #659.

[coveralls]

Pull Request Test Coverage Report for Build 15701338753

Details

• 178 of 245 (72.65%) changed or added relevant lines in 34 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.004%) to 50.382%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
sources/checkpoint.c	3	4	75.0%
sources/dollar.c	3	4	75.0%
sources/evaluate.c	0	1	0.0%
sources/execute.c	6	7	85.71%
sources/float.c	2	3	66.67%
sources/lus.c	0	1	0.0%
sources/dict.c	2	4	50.0%
sources/reken.c	5	7	71.43%
sources/sort.c	5	7	71.43%
sources/tables.c	1	3	33.33%

Files with Coverage Reduction	New Missed Lines	%
sources/threads.c	2	77.56%

Totals
Change from base Build 15649636236:	-0.004%
Covered Lines:	41784
Relevant Lines:	82935

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💛 - Coveralls