http://www.open-mpi.org/community/lists/users/2013/04/21689.php, the
assert in opal_datatype_is_contiguous_memory_layout() is not always
correct -- he supplied a test case where it was not valid,
essentially:
1. Call MPI_Type_create_indexed_block(0, ..., &newtype) and commit newtype
1. Call MPI_Type_create_resized(newtype, 0, nonzero_value, &resized) and commit resized
1. Call MPI_File_set_view with resized
This will eventually call opal_datatype_is_contiguous_memory_layout(),
and the assert will fail. After some consultation with George, it was
determined that the assert() is basically good, but it needs to also
check for (count != 0).
This commit was SVN r28398.
5bf9fffacd