[OMPI users] Bug: non-root processes use receive-type in ompi_coll_tuned_gather_intra_binomial

[Michael Hofmann]

According to the MPI Standard, "only arguments sendbuf, sendcount,  
sendtype, root, and comm are significant" on non-root processes in  
MPI_Gather. However, in routine "ompi_coll_tuned_gather_intra_binomial"  
the value of "rdtype" ("recvtype" of MPI_Gather) is used. This leads to  
crash if an uninitialized value is used.

The problem exists in version 1.4.1.

Michael