Pythia8B_i: correct the weights storage
Pythia8B_i: correct the weights storage
fix a bug introduced when investigating Py8B_i weights it should solve the problem seen in https://its.cern.ch/jira/browse/ATLMCPROD-10628
Pythia8B_i: correct the weights storage
fix a bug introduced when investigating Py8B_i weights it should solve the problem seen in https://its.cern.ch/jira/browse/ATLMCPROD-10628