Fix #380: JVET-O1109 improvement
Fix of #380: https://jvet.hhi.fraunhofer.de/trac/vvc/ticket/380
Current implementation of O1109 (MR 648) is not general enough to support multiple slice/tile/brick case for lacking the boundary check and does not handle CTU size < 64 cases.
The improved implementation will be provided. There is no performance change on CTC testing cases where CTU size =128 and no multiple slice.
Edited by Taoran Lu