Fix self derive method signature

hdwallet.go

@@ -196,7 +196,7 @@ func (w *Wallet) Derive(path accounts.DerivationPath, pin bool) (accounts.Accoun
 // user used previously (based on the chain state), but ones that he/she did not
 // explicitly pin to the wallet manually. To avoid chain head monitoring, self
 // derivation only runs during account listing (and even then throttled).
-func (w *Wallet) SelfDerive(base accounts.DerivationPath, chain ethereum.ChainStateReader) {
+func (w *Wallet) SelfDerive(base []accounts.DerivationPath, chain ethereum.ChainStateReader) {
 	// TODO: self derivation
 }