QA: suppress warnings in the histogram fit
suppress warnings from TH1::Fit() reported in this issue: https://redmine.cbm.gsi.de/issues/3090
Edit PAL: redmine Refs #3090
Edited by Pierre-Alain Loizeau
suppress warnings from TH1::Fit() reported in this issue: https://redmine.cbm.gsi.de/issues/3090
Edit PAL: redmine Refs #3090