remove warning in libva

BZ: 209178

remove warning in libva

Signed-off-by: ywan171 <yi.a.wang@intel.com>
Change-Id: Iedf52607ea2a621ca064a1a1285901ffb6e70195
Signed-off-by: root <root@feijiang-desktop.(none)>
Reviewed-on: https://android.intel.com/220738
Tested-by: Fourdan, Olivier <olivier.fourdan@intel.com>
Reviewed-by: Fourdan, Olivier <olivier.fourdan@intel.com>