[patch] global.c: Use VEC instead of VARRAY.

[Nathan Sidwell]

Kazu,
> What's the advantage of VEC_iterate?  With checking enabled, I see
> that VEC_index won't perform a length check.  Other than that, does it
> have other advantages?  (I'm not saying that VEC_iterate is useless or
> anything.  I just want to understand VEC_iterate.)

VEC_iterate is more mnemonic and less typing :)  It essentially wraps up
a VEC_length and VEC_index call together.  You should get the same assembly
out of both idioms. VEC_iterate is written so you can iterate in
either direction, btw.

Given its existance, when a loop doesn't use it, it makes me (at least)
wonder if something odd is going on.

nathan

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