Just detect support layer via virtual function instead of relying on typeid to save the day.
Just detect support layer via virtual function instead of relying on typeid to save the day.

alexrj/Slic3r,alexrj/Slic3r,curieos/Slic3r,curieos/Slic3r,pieis2pi/Slic3r,curieos/Slic3r,lordofhyphens/Slic3r,curieos/Slic3r,pieis2pi/Slic3r,lordofhyphens/Slic3r,curieos/Slic3r,lordofhyphens/Slic3r,pieis2pi/Slic3r,alexrj/Slic3r,lordofhyphens/Slic3r,alexrj/Slic3r,pieis2pi/Slic3r,lordofhyphens/Slic3r,alexrj/Slic3r,pieis2pi/Slic3r,alexrj/Slic3r,curieos/Slic3r,lordofhyphens/Slic3r,pieis2pi/Slic3r