add macro to brace interactions with JVET_M0483_IBC

source/Lib/DecoderLib/DecCu.cpp

source/Lib/DecoderLib/DecLib.cpp

source/Lib/EncoderLib/EncGOP.cpp

source/Lib/EncoderLib/EncReshape.cpp

source/Lib/EncoderLib/EncReshape.h

source/Lib/EncoderLib/IntraSearch.cpp