message: Fix warning from new Rust after merging with master.
diff: @@ -67,7 +67,7 @@ pub mod list_command {
  let res = match Payment::list_payment_addresses(wallet_handle) {
  Ok(payment_addresses_json) => {
  - let mut payment_addresses: Vec<String> = serde_json::from_str(&payment_addresses_json)
  + let payment_addresses: Vec<String> = serde_json::from_str(&payment_addresses_json)
  .map_err(|_| println_err!("Wrong data has been received"))?;
  let list_addresses =
  