window_unzoom
window_unzoom(w, 1);
window_unzoom(w, 1);
window_unzoom(w, 1);
window_unzoom(w, 1);
if (window_unzoom(w, 1) == 0)
int window_unzoom(struct window *, int);
window_unzoom(w, 0);
return (window_unzoom(w, 1) == 0);