Fix #443: Fix to the merged version of JVET-O0919 and JVET-O0650 to use joint Cb-Cr table
Fix #443: Correct use of joint CbCr table.
When updating the code for JVET-O0650 to merge with code for JVET-O0919, this was missed; it is present in the other branch (when JVET-00919 is disabled).
Edited by Frank Bossen