There're uninitialized variables warning reported by GCC.
This patch will fix it. The original commit is
c1cab54ce57c2608b8b3ea051c7041f036f21153
Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Anthony PERARD <anthony.perard@citrix.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>