min/max and types

[eric pouech]

>  * removed the undefs and using the same #ifndef for both
well, I added the undefs to be sure that we wouldn't be using
any min/max def:s lying in a libc header which might be included
before windef.h

removing the const might also be a good idea when we use min/max
on pointers and not simply int:s

A+
-- 
---------------
Eric Pouech (http://perso.wanadoo.fr/eric.pouech/)
"The future will be better tomorrow", Vice President Dan Quayle