Fix InitialConstantChange

[pkofod]

@anriseth

[codecov]

Codecov Report

Merging #122 into master will increase coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #122      +/-   ##
==========================================
+ Coverage    60.3%   60.36%   +0.06%     
==========================================
  Files           8        8              
  Lines         650      651       +1     
==========================================
+ Hits          392      393       +1     
  Misses        258      258

Impacted Files	Coverage Δ
src/initialguess.jl	79.51% <100%> (+0.24%)	⬆️

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[anriseth]

Yes, that's good :)