Fix condition on "calc temp at false vac fraction()"

[vollous]

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[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.

Project coverage is 83.32%. Comparing base (d1d5687) to head (1a84802).
Report is 2 commits behind head on master.

Files	Patch %	Lines
src/bounce_solution/bounce_solution.cpp	88.88%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #148      +/-   ##
==========================================
- Coverage   83.33%   83.32%   -0.01%     
==========================================
  Files          54       54              
  Lines       18766    18769       +3     
  Branches     1850     1848       -2     
==========================================
+ Hits        15638    15640       +2     
- Misses       3128     3129       +1     

Flag	Coverage Δ
unittests	83.32% <88.88%> (-0.01%)	⬇️

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