smack: fix: allow either entry be missing on access/access2 check (v2)

smack: fix: allow either entry be missing on access/access2 check (v2)

commit 398ce073700a2a3e86b5a0b1edecdddfa3996b27
Author: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Date:   Thu Nov 28 19:16:46 2013 +0200

    smack: fix: allow either entry be missing on access/access2 check (v2)

    This is a regression caused by f7112e6c. When either subject or
    object is not found the answer for access should be no. This
    patch fixes the situation. '0' is written back instead of failing
    with -EINVAL.

    v2: cosmetic style fixes

    Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Change-Id: Ibb84d8ab1e70d5f6689705ed28b0946b9ddde21d
Signed-off-by: Casey Schaufler <casey.schaufler@intel.com>