Correctly pass arguments to equilibrate from fortran to cpp

[dholland88]

Checklist

• There is a clear use-case for this code change
• The commit message has a short title & references relevant issues
• Build passes (scons build & scons test) and unit tests address code coverage
• The pull request is ready for review

If applicable, fill in the issue number this pull request is fixing

Fixes #

-Sorry, I broke this... As per the title, the c++ end was receiving rubbish from fortran.

[codecov]

Codecov Report

Merging #870 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #870   +/-   ##
=======================================
  Coverage   71.57%   71.57%           
=======================================
  Files         372      372           
  Lines       44503    44503           
=======================================
  Hits        31851    31851           
  Misses      12652    12652           

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