Fixed extension generation for arcs if the length is larger than the arc radius and the direction is an inset.
Fixed extension generation for arcs if the length is larger than the arc radius and the direction is an inset.

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