[0/2] libfdt: Cleanups to iteration functions [resend]

[David Gibson <david-xT8FGy+AXnRB3Ne2BGzF6laj5H9X9Tb+@public.gmane.org>]

Yet more backlog clearing.

These two patches make some cleanups to the fdt_next_node() and
fdt_next_tag() functions that I've been meaning to do for a while.

These patches do introduce minor semantic changes, and those are
exported functions.  I think they're still reasonable changes, because
the behavioural changes are in corner cases which previously had
somewhat fuzzily defined semantics anyway.  I would be very doubtful
that anyone was relying on the altered behaviour; if I'm wrong about
that these patches could need some rethinking.

These cleanups make it easier to implement property iteration, which I
have a draft patch for in the works.  I'm not posting that with this
series, because I'm having second thoughts about the details of the
interface, and I need to write some testcases.  I'll try to post that
as an RFC / work-in-progress shortly.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson