JVET-AD0056 Item 4: picture width and height constraints
Add constraints "The value of nnpfcOutputPicWidth % outSubWidthC shall be equal to 0" and "The value of nnpfcOutputPicHeight % outSubHeightC shall be equal to 0".
Add constraints "The value of nnpfcOutputPicWidth % outSubWidthC shall be equal to 0" and "The value of nnpfcOutputPicHeight % outSubHeightC shall be equal to 0".