Fix UT Decoder
Two fixes to UT decoder:
- Suppress UT clusters with 0 ADC charges.
- Use integer to calculate LHCbID instead of float to avoid inconsistent result due to floating point rounding.
Related MR: Equivalent Allen MR for LHCbID fix (Allen suppresses 0 ADC charge correctly): Allen!1607 (merged)
Edited by Da Yu Tou