lineeq
!lineeq(__virtscr->alines[top]->line,
!lineeq(__virtscr->alines[bot]->line,
if (!lineeq(__virtscr->alines[curw]->line,
!lineeq(clp->line, clp->line + 1,
static int lineeq(__LDATA *, __LDATA *, size_t);