Filter acceptability function fix

[sshin23]

In this PR, we change the filter acceptability test function to also check whether theta and varphi are NaN or Inf.

[codecov]

Codecov Report

Merging #98 (885e4dd) into master (9cf175c) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #98      +/-   ##
==========================================
+ Coverage   87.59%   87.65%   +0.06%     
==========================================
  Files          28       28              
  Lines        3288     3289       +1     
==========================================
+ Hits         2880     2883       +3     
+ Misses        408      406       -2     

Impacted Files	Coverage Δ
src/interiorpointsolver.jl	93.43% <100.00%> (+<0.01%)	⬆️
lib/MadNLPHSL/src/ma86.jl	84.90% <0.00%> (+3.77%)	⬆️

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