anchor.diff:      }
   
       // Allocate the coefficient buffer, enough for one MCU
  -    Int16List q = new Int16List(_max_blocks_per_mcu * 64 + 4);
  -    _mcu_coefficients = q;
  +    _mcu_coefficients = new Int16List(_max_blocks_per_mcu * 64 + 4);
   
       for (int i = 0; i < _max_blocks_per_mcu; ++i) {
         _mcu_block_max_zag[i] = 64;
  
positive.code:     if (_comps_in_frame == 1) {
        _scan_type = _GRAYSCALE;
        _max_blocks_per_mcu = 1;
        _max_mcu_x_size = 8 * _comp_h_samp[0];
        _max_mcu_y_size = 8 * _comp_v_samp[0];
      } else if (_comps_in_frame == 4) {
        if (((_comp_h_samp[1] != 1) || (_comp_v_samp[1] != 1)) ||
            ((_comp_h_samp[2] != 1) || (_comp_v_samp[2] != 1)) ||
  
negative.code:         _terminate(UNSUPPORTED_SAMP_FACTORS);
        }
        _scan_type = _CMYK;
        _max_blocks_per_mcu = 8;
        _max_mcu_x_size = 8;
        _max_mcu_y_size = 8;
  
      } else if (_comps_in_frame == 3) {
        if (((_comp_h_samp[1] != 1) || (_comp_v_samp[1] != 1)) ||
  