coll/libnbc: fix integer overflow #5399
Merged
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Use internal pack/unpack subroutines that operate on MPI_Aint instead of int
and hence solve some integer overflows.
Thanks Clyde Stanfield for reporting this issue.
Refs #5383
Signed-off-by: Gilles Gouaillardet [email protected]
(back-ported from commit 7629295)