__hash_line
uint32_t __hash_line(const __LDATA *, int);
lp->hash = __hash_line(lp->line, maxx);
lp->hash = __hash_line(lp->line, win->maxx);
win->alines[wy]->hash = __hash_line(
wlp->hash = __hash_line(wlp->line, curscr->maxx);
wlp->hash = __hash_line(wlp->line, curscr->maxx);
wlp->hash = __hash_line(wlp->line, __virtscr->maxx);
lp->hash = __hash_line(lp->line, ncols);