Skip rest mast ip heur if integer var unsupported

[guimarqu]

Tmp fix #182

[codecov-io]

Codecov Report

Merging #204 into master will decrease coverage by 0.02%.
The diff coverage is 90.9%.

@@            Coverage Diff             @@
##           master     #204      +/-   ##
==========================================
- Coverage   85.64%   85.61%   -0.03%     
==========================================
  Files          39       39              
  Lines        2389     2391       +2     
==========================================
+ Hits         2046     2047       +1     
- Misses        343      344       +1

Impacted Files	Coverage Δ
src/algorithms/masteripheur.jl	95.23% <90.9%> (-4.77%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update cb355de...56d983b. Read the comment docs.