message: make mc data type standalone-compatible
diff: //* ALICE Experiment at CERN, All rights reserved. *
  //* See cxx source for full Copyright notice *
  -#include "AliHLTDataTypes.h"
  -
  -
  /**
  * @struct AliHLTTPCClusterMCWeight
  * This in a struct for MC weights
  @@ -19,8 +16,8 @@ struct AliHLTTPCClusterMCWeight
  AliHLTTPCClusterMCWeight(): fMCID(-1), fWeight(0)
  {}
  - AliHLTInt32_t fMCID; // MC track ID
  - AliHLTFloat32_t fWeight; // weight of the track ID
  + int fMCID; // MC track ID
  + float fWeight; // weight of the track ID
  };
  typedef struct AliHLTTPCClusterMCWeight AliHLTTPCClusterMCWeight;
  @@ -45,7 +42,7 @@ typedef struct AliHLTTPCClusterMCLabel AliHLTTPCClusterMCLabel;
  */
  struct AliHLTTPCClusterMCData
  {
  - AliHLTUInt32_t fCount;
  + int fCount;
  #if defined(__HP_aCC) || defined(__DECCXX) || defined(__SUNPRO_CC)
  AliHLTTPCClusterMCLabel fLabels[1];
  #else
  