bug fix

Forgot to set_value in new sis checsk

src/feature_creation/feature_space/FeatureSpace.cpp

@@ -554,6 +554,7 @@ void FeatureSpace::sis(std::vector<double>& prop)
                     {
                         _phi_selected.push_back(sent_phi[inds[ii]]);
                         _phi_selected.back()->reindex(cur_feat);
+                        _phi_selected.back()->set_value();
                         scores_sel[cur_feat_local] = sent_scores[inds[ii]];
                         ++cur_feat_local;
                         ++cur_feat;