Fix possible non-determinism with owf.
Fix possible non-determinism with owf.

- Triggers when owf is on, sao is off and deblocking is on.

ultravideo/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar,lu-zero/kvazaar,lu-zero/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar