Tweak debug output in tree-ssa-structalias.c

[Daniel Berlin]

On Wed, 15 Jun 2005, Diego Novillo wrote:

> I'm starting to convert tree-ssa-alias.c to use the new points-to
> solver.  I'm not sure whether this will be ready before the end
> of Stage2 yet, but in theory it shouldn't be too bad.
>
> I'll be committing a few fixlets here and there as I work on the
> conversion.

I'm working on fixing the regressions (some of them are 
pain-in-the-asslike, in that we have to handle copies of empty 
structures, etc), so hopefully we won't bump into each other too much.