vol: fix _namei_examine_reg DELETE_ZLC usage

vol: fix _namei_examine_reg DELETE_ZLC usage

replace 'i' with 'dirl' and assign the new variable a value
before using it.

Reviewed-on: http://gerrit.openafs.org/3701
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
(cherry picked from commit 8bb5e291777a0439c7a15262bdbc70d8bd9cc4a6)

Change-Id: I9c7bb592516f609174fbf2a7b3bb6b5e0e81ba72
Reviewed-on: http://gerrit.openafs.org/3848
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>