bugfix in TOF clusterizer

Hi @p.-a.loizeau, There is probably a bug in the TOF Clusterizer; please have a look.

At the line 3960 of the CbmTofEventClusterizer.cxx:

if (hbin->GetBinContent(hbin->GetNbinsX() > 0))

It should be:

if (hbin->GetBinContent(hbin->GetNbinsX()) > 0)