Avoid using MPI_LONG_INT and inplace MPI_MINLOC/MPI_MAXLOC
Avoid using MPI_LONG_INT and inplace MPI_MINLOC/MPI_MAXLOC

Per https://github.com/rainwoodman/bigfile/pull/33, the support
for these routines are dubious on some 'vendor' MPIs.

rainwoodman/MP-sort,rainwoodman/MP-sort,rainwoodman/MP-sort