Initialize sequence/picture parameter as zero

BZ: 64406

Some fileds in libva encoder sequence/picture buffers
aren't inialised and are wrong value.

Initialize sequence/picture structures as zero, even some
fields are not used now.
Signed-off-by: Elaine Wang <elaine.wang@intel.com>

Change-Id: I3b7f5bc8bca5ddc89ce8e6e7e989c482d9f5e02a
Reviewed-on: http://android.intel.com:8080/71566
Reviewed-by: Wang, Elaine <elaine.wang@intel.com>
Reviewed-by: Shi, PingX <pingx.shi@intel.com>
Tested-by: Shi, PingX <pingx.shi@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
3 files changed