69     for ( ; lnum <= wp->w_buffer->b_ml.ml_line_count; ++lnum)  in comp_botline()
273 		    if (lnum >= curbuf->b_ml.ml_line_count || n >= halfheight)  in update_topline()
317 	if (curwin->w_botline <= curbuf->b_ml.ml_line_count)  in update_topline()
547     if (wp->w_botline > wp->w_buffer->b_ml.ml_line_count + 1)  in set_topline()
548 	wp->w_botline = wp->w_buffer->b_ml.ml_line_count + 1;  in set_topline()
1456 		if (lnum >= curbuf->b_ml.ml_line_count)  in scrollup()
1475     if (curwin->w_topline > curbuf->b_ml.ml_line_count)  in scrollup()
1476 	curwin->w_topline = curbuf->b_ml.ml_line_count;  in scrollup()
1477     if (curwin->w_botline > curbuf->b_ml.ml_line_count + 1)  in scrollup()
1478 	curwin->w_botline = curbuf->b_ml.ml_line_count + 1;  in scrollup()
1628     if (curwin->w_topline == curbuf->b_ml.ml_line_count  in scrollup_clamp()
1730 	if (lp->lnum > curbuf->b_ml.ml_line_count)  in botline_forw()
1846 	if (extra + i <= off && bot < curbuf->b_ml.ml_line_count)  in scroll_cursor_top()
1928 	if (wp->w_botline <= wp->w_buffer->b_ml.ml_line_count)  in set_empty_rows()
2048 		    || boff.lnum + 1 > curbuf->b_ml.ml_line_count)  in scroll_cursor_bot()
2082 	if (boff.lnum < curbuf->b_ml.ml_line_count)  in scroll_cursor_bot()
2200 	    if (boff.lnum < curbuf->b_ml.ml_line_count)  in scroll_cursor_halfway()
2283     if (curwin->w_botline == curbuf->b_ml.ml_line_count + 1  in cursor_correct()
2358 	if (cln > botline && curwin->w_botline <= curbuf->b_ml.ml_line_count)  in cursor_correct()
2384     if (curbuf->b_ml.ml_line_count == 1)    // nothing to do  in onepage()
2400 		? ((curwin->w_topline >= curbuf->b_ml.ml_line_count - so)  in onepage()
2401 		    && curwin->w_botline > curbuf->b_ml.ml_line_count)  in onepage()
2426 		if (curwin->w_topline > curbuf->b_ml.ml_line_count)  in onepage()
2427 		    curwin->w_topline = curbuf->b_ml.ml_line_count;  in onepage()
2430 	    else if (curwin->w_botline > curbuf->b_ml.ml_line_count)  in onepage()
2433 		curwin->w_topline = curbuf->b_ml.ml_line_count;  in onepage()
2479 		if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)  in onepage()
2480 		    curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;  in onepage()
2494 	    if (loff.lnum >= curbuf->b_ml.ml_line_count)  in onepage()
2496 		loff.lnum = curbuf->b_ml.ml_line_count;  in onepage()
2601 				  && old_topline < curbuf->b_ml.ml_line_count)  in onepage()
2610 	else if (curwin->w_botline > curbuf->b_ml.ml_line_count)  in onepage()
2714 	while (n > 0 && curwin->w_botline <= curbuf->b_ml.ml_line_count)  in halfpage()
2738 		if (curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)  in halfpage()
2770 		} while (curwin->w_botline <= curbuf->b_ml.ml_line_count);  in halfpage()
2783 			&& curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)  in halfpage()