`calibration_functions` for `A/E` throws an error in case `ppars` validity selections are broken

[theHenks]

We should somehow catch to be able to use the event building in LegendEventAnalysis even in the case when part of the pars are broken because e.g. we are working on updates here. This bug was recently discovered by @verenaaur during the execution of the calibrate_ged_channel_data