cleanup MVPNum
TComPicYuv: add a row and col of padding for lowres interpolation

--HG--
branch : stable
TComYuv: pad chroma allocations, fix valgrind warnings

--HG--
branch : stable
wavefront: consider enabled bitmap status in checkHigherPriorityRow()

--HG--
branch : stable
extra : rebase_source : ef2590e891b068e78f51987f70b7cfae1524e8fb
wavefront: bug fix

--HG--
branch : stable
Merge with stable