message: Fix rust wrappers for frozen ledgers
diff: @@ -1529,11 +1529,12 @@ pub fn build_ledgers_freeze_request(submitter_did: &str, ledgers_ids: &str) -> B
  fn _build_ledgers_freeze_request(command_handle: CommandHandle, submitter_did: &str, ledgers_ids: &str, cb: Option<ResponseStringCB>) -> ErrorCode {
  let submitter_did = c_str!(submitter_did);
  + let ledgers_ids = c_str!(ledgers_ids);
  ErrorCode::from(unsafe {
  ledger::indy_build_ledgers_freeze_request(command_handle,
  submitter_did.as_ptr(),
  - ledgers_ids.as_ptr() as *const i8,
  + ledgers_ids.as_ptr(),
  cb)
  })
  }
  