[PATCH] knfsd: Tidy up unix_domain_find

We shouldn't really compare &new->h with anything when new ==NULL, and gather
three different if statements that all start

  if (rv ...

into one large if.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>