wallet: Store and annotate withdrawals in the DB

We weren't storing them so far, which is sub-optimal :-)

Signed-off-by: Christian Decker <decker.christian@gmail.com>

wallet/walletrpc.c

@@ -343,11 +343,18 @@ static struct command_result *json_withdraw(struct command *cmd,
 {
 	struct unreleased_tx *utx;
 	struct command_result *res;
+	struct bitcoin_txid txid;
 
 	res = json_prepare_tx(cmd, buffer, params, &utx);
 	if (res)
 		return res;
 
+	/* Store the transaction in the DB and annotate it as a withdrawal */
+	bitcoin_txid(utx->tx, &txid);
+	wallet_transaction_add(cmd->ld->wallet, utx->tx, 0, 0);
+	wallet_transaction_annotate(cmd->ld->wallet, &txid,
+				    TX_WALLET_WITHDRAWAL, 0);
+
 	return broadcast_and_wait(cmd, utx);
 }