Revert "Deal with empty attributes. Empty sens_ind means empty sens_ind."
Revert "Deal with empty attributes. Empty sens_ind means empty sens_ind."

This reverts commit e8739b87a43692cbcc3ae297f44a26f7795cbe6f.

AMICI-developer/AMICI,AMICI-developer/AMICI,FFroehlich/AMICI,AMICI-developer/AMICI,FFroehlich/AMICI,AMICI-developer/AMICI,FFroehlich/AMICI,FFroehlich/AMICI