volinfo: fix size totals when saving inodes

volinfo: fix size totals when saving inodes

Fix the volume size calculation when volinfo is invoked with
both -sizeOnly and -saveinodes at the same time.

Reviewed-on: http://gerrit.openafs.org/4691
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit ababc1ba4412ae94b29f8ba0832eac087a024af2)

Change-Id: I371a983078c12e09474051ba71f63cdeb57c3631
Reviewed-on: http://gerrit.openafs.org/6301
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Tested-by: Derrick Brashear <shadow@dementix.org>
Reviewed-by: Derrick Brashear <shadow@dementix.org>