NAME
          pnet_free - Deallocate memory of Pnet struct

     SYNOPSIS
          #include <mpi.h>
          #include "pnet.h"

          void pnet_free(Pnet *pnet);

     DESCRIPTION
          Function frees allocated memory. Must be the last call.  The
          argument of pnet_free is:

          pnet Pointer to initialized Pnet struct

     RETURN VALUE
          None

     AUTHORS
          For authors and contributors see AUTHORS file


     COPYRIGHT
          (C) Potsdam Institute for Climate Impact Research (PIK), see
          COPYRIGHT file


     SEE ALSO
          pnet_setup(3), pnet_init(3), pnet_addconnect(3), pnet_lo(3),
          pnet_hi(3), pnet_nodes(3)