Fix crash when decorating clusters and noise is on

HEP-FCC / k4RecCalorimeter

Key4hep Framework Components for the Calorimeter Reconstruction

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Fix crash when decorating clusters and noise is on #121

Closed giovannimarchiori closed 2 weeks ago

giovannimarchiori commented 2 weeks ago

When calculating RMS width of showers in layers of ECAL when noise is on the RMS can be negative due to negative-energy cells. In that case the code was crashing. This PR will set the width to zero for those cases