Checks to see if unsigned integers < 0

[Volker Lendecke]

On Fri, Jul 12, 2013 at 08:36:13PM +0200, Herwin Weststrate wrote:
> (Issues were found compiling with clang, so it's a kind of static
> code analysis)
> 
> A number of times some checks are run to see if an unsigned integer
> is smaller than zero. Of course this cannot be true, this patch
> removes these checks.

Question -- is it guaranteed by Posix that uid_t is unsigned?

Volker

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