rb8: Tidy up logic in handle_dist

[Richard Boulton]

This patch simply tidies up some very confusing logic.

I'm not sure whether patches such as this are useful, or should only be
submitted as part of a patch to fix some problem.  I found that I couldn't
understand properly what was going on here though, and needed to refactor
the code so I could follow it...

I'd appreciate some guidance on whether I should submit patches similar to
this in future.

-- 
Richard

patch3
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