SS_CURENB
ss->ss_flags |= SS_CURENB;
ss->ss_flags &= ~SS_CURENB;
if ((si->si_curscreen->ss_flags & SS_CURENB) != 0)
ss->ss_flags |= SS_CURENB;
ss->ss_flags &= ~SS_CURENB;
ss->ss_flags = SS_ALLOCED | SS_ACTIVE | SS_CURENB;
ss->ss_flags = SS_ALLOCED | SS_CURENB;