JVET-P0158: Apply ALF VB on the bottom CTU row

[bheng]

There is one additional modification needed to treat the final CTU row the same as all other CTU rows for VB processing.

Specifically, in AdaptiveLoopFilter::deriveClassification():

The following code

( ( i - blk.pos().y + blkDst.pos().y + nHeight >= m_picHeight ) ? m_picHeight : m_alfVBLumaPos )

should just be

m_alfVBLumaPos

[jennylai]

yes, you are right. This part is missing.

Thanks for reporting.

[bheng]

Fixed in merge request jvet/VVCSoftware_VTM!1167