The subarray datatype was not packing/unpacking correctly. This was
leading to wrong results whenever the lb of the subarray datatype was
non-zero.
I tracked the issue to the use of ompi_datatype_create_resized. This
function simply duplicates the old datatype and sets the lb and
extent. This is unfortunately insufficent for the pack/unpack
functions which use the loop end first element offset NOT the lb. This
offset is 0 in the resized datatype. Once ompi_datatype_create_resized
has been fixed this commit should be reverted.
Fixes#380.
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
88072f9b8b