VTermScreen *vterm_obtain_screen(VTerm *vt)
{
  if(!vt->screen)
    vt->screen = screen_new(vt);
  return vt->screen;
}
VTermScreen *vterm_obtain_screen(VTerm *vt)
{
  if(!vt->screen)
    vt->screen = screen_new(vt);
  return vt->screen;
}