account: fix nested derivation.
account: fix nested derivation.

VidaID/bcoin,decentraland/bronzeage-node,decentraland/bronzeage-node,decentraland/decentraland-node,VidaID/bcoin,decentraland/decentraland-node,decentraland/bronzeage-node,decentraland/decentraland-node,VidaID/bcoin