message: fix slice data create for emptry slice
diff: @@ -145,7 +145,7 @@ GPUh() void AliHLTTPCCASliceData::SetGPUSliceDataMemory(void* const pSliceMemory
  size_t AliHLTTPCCASliceData::SetPointers(const AliHLTTPCCAClusterData *data, bool allocate)
  {
  //Set slice data internal pointers
  - int hitMemCount = (fLastRow - fFirstRow + 1) * (sizeof(HLTCA_GPU_ROWALIGNMENT) / sizeof(ushort_v) - 1) + fNumberOfHits;
  + int hitMemCount = (fLastRow - fFirstRow + 1) * (sizeof(HLTCA_GPU_ROWALIGNMENT) / sizeof(ushort_v) - 1) + data->NumberOfClusters();
  //Calculate Memory needed to store hits in rows
  @@ -218,7 +218,7 @@ void AliHLTTPCCASliceData::InitFromClusterData( const AliHLTTPCCAClusterData &da
  int NumberOfClustersInRow[HLTCA_ROW_COUNT];
  memset(NumberOfClustersInRow, 0, HLTCA_ROW_COUNT * sizeof(int));
  fFirstRow = HLTCA_ROW_COUNT;
  - fLastRow = -1;
  + fLastRow = 0;
  for (int i = 0;i < fNumberOfHits;i++)
  {
  @@ -247,6 +247,7 @@ void AliHLTTPCCASliceData::InitFromClusterData( const AliHLTTPCCAClusterData &da
  tmpHitIndex[newIndex] = i;
  }
  }
  + if (fFirstRow == HLTCA_ROW_COUNT) fFirstRow = 0;
  ////////////////////////////////////
  // 1. prepare arrays
  