Merge branch 'reset-molecules' of github.com:lammps/lammps into reset-molecules

    self.lib.lammps_neighlist_element_neighbors.argtypes = [c_void_p, c_int, c_int, POINTER(c_int), POINTER(c_int), POINTER(POINTER(c_int))]

    self.lib.lammps_neighlist_element_neighbors.restype  = None

    self.lib.lammps_has_error.argtypes = [c_void_p]

    self.lib.lammps_has_error.restype = c_bool

    self.lib.lammps_get_last_error_message.argtypes = [c_void_p, c_char_p, c_int]

    self.lib.lammps_get_last_error_message.restype = c_int

    # if no ptr provided, create an instance of LAMMPS

    #   don't know how to pass an MPI communicator from PyPar

    #   but we can pass an MPI communicator from mpi4py v2.0.0 and later

    // execute the command

    if (execute_command())

    if (execute_command() && line)

      error->all(FLERR,fmt::format("Unknown command: {}",line));

  }

}