vol: Initialise list before error exit when cloning

vol: Initialise list before error exit when cloning

The inode list wasn't being initialised before the first call into the
error handler. This makes it possible that we end up trying to discard
items from an uninitialised list, with all the chaos that would cause.
Fix things so that this list is correctly set up.

Change-Id: I5dbc33e2e1a9a4ca1bdf4b2f7e56f33af87ccc1a
Reviewed-on: http://gerrit.openafs.org/5001
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>