240 	Avl *node;  member
320 		if(w->node == a){  in walkdel()
323 			w->node = p;  in walkdel()
357 		w->node = a;  in avlnext()
360 		a = findsuccessor(w->node);  in avlnext()
361 		if(a == w->node)  in avlnext()
363 		w->node = a;  in avlnext()
365 	return w->node;  in avlnext()
376 		w->node = a;  in avlprev()
380 		return w->node;  in avlprev()
382 		a = findpredecessor(w->node);  in avlprev()
383 		if(a == w->node)  in avlprev()
385 		w->node = a;  in avlprev()
387 	return w->node;  in avlprev()