iPhone support?

Not sure where that GL_NONE is supposed to be defined, so for now I just set it to 0


#define GL_NONE 0 // GL_NONE_OES

Next error is here:

void IPhoneGraphicsWindow::
close_window() {
  //  system_close_window();

  WindowProperties properties;
  properties.set_open(false);
  system_changed_properties(properties);

//  release_system_resources(false);
  _gsg.clear();
  [color=red]_active = false;
  GraphicsWindow::close_window();
}

_active isn’t found so I replaced it with set_active(false)