fix#1029: encoder/decoder mismatch when RDOQOff

source/Lib/CommonLib/Quant.cpp

@@ -1003,8 +1003,12 @@ void Quant::quant(TransformUnit &tu, const ComponentID &compID, const CCoeffBuf
     const uint32_t lfnstIdx = tu.cu->lfnstIdx;
     const int maxNumberOfCoeffs = lfnstIdx > 0 ? ((( uiWidth == 4 && uiHeight == 4 ) || ( uiWidth == 8 && uiHeight == 8) ) ? 8 : 16) : piQCoef.area();
     memset( piQCoef.buf, 0, sizeof(TCoeff) * piQCoef.area() );
-    for (int uiBlockPos = 0; uiBlockPos < maxNumberOfCoeffs; uiBlockPos++ )
+
+    const ScanElement* scan = g_scanOrder[SCAN_GROUPED_4x4][SCAN_DIAG][gp_sizeIdxInfo->idxFrom(uiWidth)][gp_sizeIdxInfo->idxFrom(uiHeight)];
+
+    for (int uiScanPos = 0; uiScanPos < maxNumberOfCoeffs; uiScanPos++)
     {
+      const int uiBlockPos = scan[uiScanPos].idx;
       const TCoeff iLevel   = piCoef.buf[uiBlockPos];
       const TCoeff iSign    = (iLevel < 0 ? -1: 1);