[OMPI users] Invalid info object in MPI_Comm_spawn_multiple

[Federico Golfrè Andreasi]

In the info object I only set the "host" key (after creatig the object with
the MPI_Info_create).

I've modified my code to leave out that request and created the array of
Info object as an array of MPI_INFO_NULL but the problem is still the same.
The error is thrown only when running with more than one process.

I tried also the previous OpenMPI version (v 1.3.2).

Do I send you a short program for testing it?

Thank you!
     Federico