libstand modification [committed]

[Sean Bruno]

On Tue, 2014-07-22 at 08:45 -0700, Sean Bruno wrote:
> https://phabric.freebsd.org/D443
> 
> the 64bit version of userboot has been screaming about bit shifting
> operators for a while now.
> 
> The short explanation, amd64 sizeof(long) != i386 sizeof(long).
> 
> The long explanation is in the phabric diff and comments.
> 
> I see no reason to not commit this, but thought I'd throw it here for
> your commentary.
> 
> sean

This is now in head.

sean