LU-3179 fids: fix compilation error with gcc 4.7.2

LU-3179 fids: fix compilation error with gcc 4.7.2

initialize oi.oi.oi_id which gcc 4.7.2 is afraid of being
used later.

Signed-off-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Change-Id: Iaeb6eac01340d80786463efe67ff74479017f074
Reviewed-on: http://review.whamcloud.com/6064
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>