Passing only fairness_objects to fairness_check

[katherineking4]

I was trying to pass three fairness objects into fairness_check to plot them all at once. This was the error I received: _Error in fairness_check(fairness_train_sex_cutoff, protected = analysis_train$sex, : object 'parityloss' not found

It looks like when an explainer is not passed to fairness_check the parity loss object is not created but the names of this object are referenced later [_colnames(parity_loss_metric_data) <- names(parityloss)] so the function fails

[jakwisn]

Thanks for the issue! The bug should be now fixed.