WIP: check c structs size

[felipenoris]

This will not be merged. It's for CI debug only.

[codecov-io]

Codecov Report

Merging #15 into master will decrease coverage by 11.24%.
The diff coverage is 32.35%.

@@             Coverage Diff             @@
##           master      #15       +/-   ##
===========================================
- Coverage   79.48%   68.24%   -11.25%     
===========================================
  Files           5        6        +1     
  Lines         117      148       +31     
===========================================
+ Hits           93      101        +8     
- Misses         24       47       +23

Impacted Files	Coverage Δ
src/c.jl	31.57% <ø> (ø)	⬆️
src/LibXLS.jl	100% <ø> (ø)	⬆️
src/date.jl	0% <0%> (ø)
src/types.jl	100% <100%> (ø)	⬆️
src/workbook.jl	88.67% <100%> (+0.67%)	⬆️
src/worksheet.jl	82% <60%> (-5.81%)	⬇️

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