sc_term_del_line
sc_term_del_line(scp, scp->ypos, tcp->param[0],
sc_term_del_line(scp, 0, tcp->param[0],
sc_term_del_line(scp, head, n - (tail - scp->ypos) + 1,
static __inline void sc_term_del_line(scr_stat *scp, int y, int n, int ch,