[Patch, fortran] First steps to array descriptor reform

[Paul Richard Thomas]

Thomas,

> Upon reflection, I think you're right.  It is probably a good idea to
> keep the differences between trunk and the branch as small as possible.

Indeed, that was why I thought that the lack of functional change was
significant; although preparing for API change, it is a tidy-up as
much as anything.

Cheers

Paul