message: don't create a read transaction when getting the latest version
diff: @@ -800,8 +800,8 @@ void RealmCoordinator::on_change()
  #if REALM_ENABLE_SYNC
  // Invoke realm sync if another process has notified for a change
  if (m_sync_session) {
  - auto versionId = m_db->start_read()->get_version_of_current_transaction();
  - SyncSession::Internal::nonsync_transact_notify(*m_sync_session, versionId.version);
  + auto version = m_db->get_version_of_latest_snapshot();
  + SyncSession::Internal::nonsync_transact_notify(*m_sync_session, version);
  }
  #endif
  }
  