Gui: [skip ci] Coverity: Uninitialized pointer field
Gui: [skip ci] Coverity: Uninitialized pointer field

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