msi: Avoid a potential NULL pointer dereference (coccicheck).

[Hans Leidekker]

On Thu, 2010-05-20 at 10:03 +0200, Paul Vriens wrote:

> >> The main reason I'm asking is because we have several of these lingering
> >> around (and marked as 'FALSE' in Coverity).
> >
> > In this particular case we should just get rid of the goto.
> >
> >
> But is it a (potential) issue? I guess not. If it's not an issue wee can 
> leave the code as is, not?

It's a header construction where you typically exploit the fact that the
header and extended structure start at the same address. So yes, we
could leave the code as is.