decoding mismatch sometimes occurred when setting macro CTU_256 to 0
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Setting CTU_256 to 0 will cause TU_256 to fail as well. In this case, there will be a compiler error due to undefined PI.
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Executable encoder and decoder can be generated after redefining PI. But sometimes, there is a decoding mismatch. For example, using the command EncoderAppStatic -c encoder_randomaccess_ecm.cfg -c ./per-sequence/BasketballDrive.cfg --QP=37 --FramesToBeEncoded=33 --IntraPeriod=64 --TemporalSubsampleRatio=1 --PrintHexPSNR -v 6 -dph 1 -w 1 --CTUSize=128 at encode side, there will be a decoding mistach.