391 		if (!win_valid(prevwin))  in do_window()
1469 win_valid(win_T *win)  in win_valid()  function
2542 	    if (!win_valid(win))  in win_close()
2550 	if (!win_valid(win))  in win_close()
2570     if (popup_win_closed(win) && !win_valid(win))  in win_close()
2582     if (only_one_window() && win_valid(win) && win->w_buffer == NULL  in win_close()
2604     if (!win_valid(win) || last_window()  in win_close()
3631     for (wp = firstwin; win_valid(wp); wp = nextwp)  in close_others()
3639 	    if (!win_valid(wp))		// autocommands messed wp up  in close_others()
3651 		    if (!win_valid(wp))		// autocommands messed wp up  in close_others()
4400     if (curtab == tp && win_valid(wp))  in goto_tabpage_win()
4505     if (win_valid(owp) && owp->w_p_cole > 0 && !msg_scrolled)  in win_goto()
4759 	    if (!win_valid(wp))  in win_enter_ext()
4763 	if (!win_valid(wp))  in win_enter_ext()
6807 	    || (sn->fr_win != NULL && !win_valid(sn->fr_win)))  in check_snapshot_rec()