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Alain Miniussi 34c546b9cd Merge pull request #20 from aminiussi/nulltopo
MPI_COMM_NULL is not a valid argument for MPI_Topo_test.
But it is used to indicated leftover processes when creating graph communicator or cartesians grids (for exampl, when you create a 2X2 grid from a 5 process communicator).

So we need to deal with it as a special case.
2014-10-07 10:13:37 +02:00
2014-09-16 11:32:17 +02:00
2014-08-18 15:07:26 +01:00
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