linux: make reading unixusers from proc actually work

our indentation did not match our braces so we would never read all the
objects in each unixuser hash chain. add the missing braces

Reviewed-on: http://gerrit.openafs.org/11094
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: D Brashear <shadow@your-file-system.com>
(cherry picked from commit 279e01051600f0884ed3669786543578e53cf518)

Change-Id: If8d4faf8a9cc301d231c1f7b11ab5bb9ca721451
Reviewed-on: http://gerrit.openafs.org/11093
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Perry Ruiter <pruiter@sinenomine.net>
Reviewed-by: Ken Dreyer <ktdreyer@ktdreyer.com>
Reviewed-by: Nathaniel Filardo <nwfilardo@gmail.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>