FIX get_val logistic

[codecov-io]

Codecov Report

Merging #77 (96dcc2f) into master (9165428) will increase coverage by 0.31%. The diff coverage is 94.49%.

@@            Coverage Diff             @@
##           master      #77      +/-   ##
==========================================
+ Coverage   63.57%   63.88%   +0.31%     
==========================================
  Files          41       42       +1     
  Lines        3025     3029       +4     
  Branches      302      305       +3     
==========================================
+ Hits         1923     1935      +12     
+ Misses       1026     1020       -6     
+ Partials       76       74       -2     

Impacted Files	Coverage Δ
sparse_ho/criterion/held_out.py	87.70% <ø> (+4.91%)	:arrow_up:
sparse_ho/tests/test_grid_search.py	92.40% <84.61%> (-7.60%)	:arrow_down:
sparse_ho/tests/common.py	100.00% <100.00%> (ø)
sparse_ho/tests/test_criterion.py	100.00% <100.00%> (+31.37%)	:arrow_up:
sparse_ho/tests/test_models.py	80.23% <100.00%> (-7.97%)	:arrow_down:
sparse_ho/criterion/cross_val.py	61.70% <0.00%> (-19.15%)	:arrow_down:
sparse_ho/algo/forward.py	65.38% <0.00%> (-2.57%)	:arrow_down:
sparse_ho/criterion/sure.py	92.18% <0.00%> (+4.68%)	:arrow_up:

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[agramfort]

thx @QB3 !