Handle anchor in a run of blocks.

Fix dff50c3a5f2224592d135ad9cc6c11be89e26def: if multiple blocks come between
polling, we'll get called once for the new tip.

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

daemon/peer.c

@@ -2961,7 +2961,8 @@ static enum watch_result anchor_depthchange(struct peer *peer,
 {
 	/* Still waiting for it to reach depth? */
 	if (state_is_waiting_for_anchor(peer->state)) {
-		if ((int)depth == peer->anchor.ok_depth) {
+		/* We can see a run of blocks all at once, so may be > depth */
+		if ((int)depth >= peer->anchor.ok_depth) {
 			state_event(peer, BITCOIN_ANCHOR_DEPTHOK, NULL);
 			peer->anchor.ok_depth = -1;
 		}