remove custom vector usage from USER-DPD:fix_rx.cpp

     TimerType now = getTimeStamp();

     // Query the fix database and look for rx_weight for the balance fix.

     int type_flag = -1;

     int rx_weight_index = atom->find_custom( "rx_weight", /*0:int, 1:float*/ type_flag );

     // Compute the average # of neighbors.

     double averageNumNeighbors = 0;

     {

     printf("me= %d nst= %g nfc= %g time= %g nlocal= %g lmpnst= %g weight_idx= %d 1st= %d aveNeigh= %g\n", comm->me, this->diagnosticCounter[0], this->diagnosticCounter[1], this->diagnosticCounter[2], this->diagnosticCounter[3], this->diagnosticCounter[4], rx_weight_index, firstStep, averageNumNeighbors);

     if (rx_weight_index != -1 && !firstStep && 0)

     {

        double *rx_weight = atom->dvector[rx_weight_index];

        const int nlocal = atom->nlocal;

        const int *mask = atom->mask;

        if (odeIntegrationFlag == ODE_LAMMPS_RKF45 && diagnosticFrequency == 1)

        {

          const double total_time = getElapsedTime( oldTimeStamp, now );

          const double fixrx_time = this->diagnosticCounter[TimeSum];

          const double time_ratio = fixrx_time / total_time;

          double tsum = 0.0;

          double tmin = 100000, tmax = 0;

          for (int i = 0; i < nlocal; ++i)

            if (mask[i] & groupbit)

            {

              double nfunc_ratio = double( diagnosticCounterPerODE[FuncSum][i] ) / diagnosticCounter[FuncSum];

              rx_weight[i] = nfunc_ratio * fixrx_time + (total_time - fixrx_time) / nlocal;

              tmin = fmin( tmin, rx_weight[i] );

              tmax = fmax( tmax, rx_weight[i] );

              tsum += rx_weight[i];

              //rx_weight[i] = (double) diagnosticCounterPerODE[FuncSum][i];

            }

          printf("me= %d total= %g fixrx= %g ratio= %g tsum= %g %g %g %g\n", comm->me, total_time, fixrx_time, time_ratio, tsum, (total_time - fixrx_time) / nlocal, tmin, tmax);

        }

        else

        {

          error->warning(FLERR, "Dynamic load balancing enabled but per-atom weights not available.");

          for (int i = 0; i < nlocal; ++i)

            if (mask[i] & groupbit)

              rx_weight[i] = 1.0;

        }

     }

     firstStep = false;

     oldTimeStamp = now;

  }