C internals cleanup

I've been poking around in the source for git, and wanted to pitch in  
and clean some things up.

Two biggies that tend to get overlooked: Applying the const keyword  
where possible, and localizing variables to innermost blocks.

Also, want to to get a target going in the Makefile for running under  
splint.

Just want to make sure my internal cleanups are not going to be seen  
as a nuisance.

xoxo,
Andy

--
Andy Lester => andy@petdance.com => www.petdance.com => AIM:petdance