FEM: ccx input writer, do not write EigenmodeLimits if they are set to -1.0
FEM: ccx input writer, do not write EigenmodeLimits if they are set to -1.0

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master