peer: do not send anchor depth input twice.

We *should* be in a state which accepts it (could happen with reorg),
and there's no reason to test for greater than depth since we must process
blocks in order.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

daemon/peer.c

@@ -2960,8 +2960,8 @@ static enum watch_result anchor_depthchange(struct peer *peer,
 					    void *unused)
 {
 	/* Still waiting for it to reach depth? */
-	if (state_is_opening(peer->state)) {
-		if ((int)depth >= peer->anchor.ok_depth) {
+	if (state_is_waiting_for_anchor(peer->state)) {
+		if ((int)depth == peer->anchor.ok_depth) {
 			state_event(peer, BITCOIN_ANCHOR_DEPTHOK, NULL);
 			peer->anchor.ok_depth = -1;
 		}

state.h

@@ -40,6 +40,14 @@ static inline bool state_is_opening(enum state s)
 	return s < STATE_NORMAL;
 }
 
+static inline bool state_is_waiting_for_anchor(enum state s)
+{
+	return s == STATE_OPEN_WAITING_OURANCHOR
+		|| s == STATE_OPEN_WAITING_OURANCHOR_THEYCOMPLETED
+		|| s == STATE_OPEN_WAITING_THEIRANCHOR
+		|| s == STATE_OPEN_WAITING_THEIRANCHOR_THEYCOMPLETED;
+}
+
 static inline bool state_can_io(enum state s)
 {
 	if (state_is_error(s))