re: src/common/lib/libutil

[matthew green <mrg%eterna.com.au@localhost>]

> > Module Name:    src
> > Committed By:   mrg
> > Date:           Thu Aug  8 04:32:43 UTC 2013
> >
> > Modified Files:
> >         src/common/lib/libutil: snprintb.c
> >
> > Log Message:
> > apply some do { ... } while (0) so that macros aren't broken,
> > completing the previous change.
> 
> Now that the macros themselves are updated, is there any reason not to 
> remove extraneous { ... } around their invocations?
> 
> Diffs are attached...

LGTM.