Refactor all "int" to "int32" for sizeof() compatibility. Fixes #683

[kamphaus]

Fixes #683

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This change is 

[codecov]

Codecov Report

Merging #687 into master will decrease coverage by 0.3%.
The diff coverage is 85.38%.

@@            Coverage Diff             @@
##           master     #687      +/-   ##
==========================================
- Coverage   82.18%   81.88%   -0.31%     
==========================================
  Files         164      164              
  Lines        8841     8875      +34     
==========================================
+ Hits         7266     7267       +1     
- Misses       1178     1207      +29     
- Partials      397      401       +4

Impacted Files	Coverage Δ
darwin/ctype.go	55.1% <ø> (ø)	⬆️
program/function_definition.go	100% <ø> (ø)	⬆️
darwin/assert.go	0% <0%> (ø)	⬆️
transpiler/unary.go	74.55% <0%> (-1.34%)	⬇️
transpiler/enum.go	84.61% <100%> (-6.67%)	⬇️
noarch/noarch.go	50% <100%> (ø)	⬆️
transpiler/transpiler.go	86.85% <100%> (ø)	⬆️
types/cast.go	67.53% <100%> (ø)	⬆️
linux/math.go	100% <100%> (ø)	⬆️
noarch/string.go	100% <100%> (ø)	⬆️
... and 19 more

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[elliotchance]

Reviewed 19 of 29 files at r1, 12 of 12 files at r3, 2 of 2 files at r4.
Review status: all files reviewed at latest revision, all discussions resolved.

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