LU-3428 build: fix 'uninitialized variables' errors

LU-3428 build: fix 'uninitialized variables' errors

Fix 'uninitialized variables' defects found by Coverity version 6.5.1:
Uninitialized scalar variable (UNINIT)
Using uninitialized value.

Signed-off-by: Sebastien Buisson <sebastien.buisson@bull.net>
Change-Id: I594b3c509ec72cb35829fb675c4a23c6ef03b6d8
Reviewed-on: http://review.whamcloud.com/6511
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Bobbie Lind <bobbie.j.lind@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>