1432     int		bot_start = 999;// first row of the bot area that needs  in win_update()  local
1849 			bot_start = wp->w_height - row;  in win_update()
1853 		if ((row == 0 || bot_start < 999) && wp->w_lines_valid != 0)  in win_update()
1859 		    bot_start = 0;  in win_update()
1866 			if (row > 0 && bot_start + row  in win_update()
1872 			bot_start += wp->w_lines[idx++].wl_size;  in win_update()
1884 		    if (wp->w_p_diff && bot_start > 0)  in win_update()
2214 		|| (row + wp->w_lines[idx].wl_size > bot_start)  in win_update()
2294 		    bot_start = 0;  in win_update()
2341 				bot_start = wp->w_height + xtra_rows;  in win_update()
2392 			    if (bot_start > x)  in win_update()
2393 				bot_start = x;  in win_update()