message: BugFix: do not even call DoTracklet for invalid tracklet id
diff: @@ -73,10 +73,12 @@ GPUdi() void AliHLTTPCCATrackletConstructor::AliHLTTPCCATrackletConstructorGPU(G
  GPUsync();
  }
  - rMem.fGo = rMem.fItr >= 0 && rMem.fItr < sMem.fNTracklets;
  -
  + if (rMem.fItr >= 0 && rMem.fItr < sMem.fNTracklets)
  + {
  + rMem.fGo = true;
  DoTracklet(tracker, sMem, rMem);
  }
  + }
  if (++mySlice >= nSlices) mySlice = 0;
  }
  }
  