BugLink: http://bugs.launchpad.net/bugs/1541592

Fix crash in fcp command completion path.

Missed null check.
Signed-off-by: Dick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: James Smart <james.smart@avagotech.com>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit c90261dc)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>