avoid memory leak and initialize class member pointers

   one_coeff = 1;

   no_virial_fdotr_compute = 1;

   manybody_flag = 1;

   map = NULL;

   quip_potential = NULL;

   quip_file = NULL;

   quip_string = NULL;

}

PairQUIP::~PairQUIP()

    memory->destroy(setflag);

    memory->destroy(cutsq);

    delete [] map;

    delete [] quip_potential;

  }

  delete [] quip_potential;

  delete [] quip_file;

  delete [] quip_string;

}

void PairQUIP::compute(int eflag, int vflag)