Update atom_vec_sph.cpp

  fields_border_vel = (char *) "rho esph cv vest";

  fields_exchange = (char *) "rho esph cv vest";

  fields_restart = (char * ) "rho esph cv vest";

  fields_create = (char *) "rho esph cv vest de drho";

  fields_create = (char *) "rho esph cv vest desph drho";

  fields_data_atom = (char *) "id type rho esph cv x";

  fields_data_vel = (char *) "id v";