Use proper data type for RPR scaling

source/Lib/CommonLib/CommonDef.h

source/Lib/CommonLib/InterPrediction.cpp

source/Lib/CommonLib/InterPrediction.h

source/Lib/CommonLib/Picture.cpp

source/Lib/CommonLib/Picture.h

source/Lib/CommonLib/Slice.cpp

source/Lib/CommonLib/Slice.h

source/Lib/CommonLib/TypeDef.h

source/Lib/CommonLib/UnitTools.cpp

source/Lib/CommonLib/UnitTools.h

source/Lib/DecoderLib/DecLib.cpp

source/Lib/EncoderLib/EncGOP.cpp

source/Lib/EncoderLib/EncLib.cpp

source/Lib/EncoderLib/InterSearch.cpp

source/Lib/Utilities/VideoIOYuv.cpp