message: at least print a warning message when the ALIGN_ITSB_TPC is not created
diff: @@ -1120,6 +1120,8 @@ void AliTPCPreprocessorOffline::AddAlignmentGraphs( TObjArray * vdriftArray, Al
  TObjArray * arrayITSP= AliTPCcalibDButil::SmoothRelKalman(arrayITS,mstatITS, 0, 5.);
  TObjArray * arrayITSM= AliTPCcalibDButil::SmoothRelKalman(arrayITS,mstatITS, 1, 5.);
  TObjArray * arrayITSB= AliTPCcalibDButil::SmoothRelKalman(arrayITSP,arrayITSM);
  + if (arrayITSB == NULL) AliWarning("Failed to create ALIGN_ITSB_TPC object!");
  +
  TObjArray * arrayTOFP= AliTPCcalibDButil::SmoothRelKalman(arrayTOF,mstatTOF, 0, 5.);
  TObjArray * arrayTOFM= AliTPCcalibDButil::SmoothRelKalman(arrayTOF,mstatTOF, 1, 5.);
  TObjArray * arrayTOFB= AliTPCcalibDButil::SmoothRelKalman(arrayTOFP,arrayTOFM);
  