DD4HEP segmentation bug - GridPhiEta not working

### Environment: (where does this bug occur, have you tried other environments)
- Which branch (`main` for latest released):
- Which revision (`HEAD` for the most recent):
- Any specific OS or system where the issue occurs?
- Any special versions of ROOT or Geant4?

### Steps to reproduce: (give a step by step account of how to trigger the bug)
1. Originally with ATHENA bHCAL
2. Set segmentation to GridPhiEta
3. Run simulation

### Expected Result: (what do you expect when you execute the steps above)

hit distributions in phi,eta

### Actual Result: (what do you get when you execute the steps above)

all hits at eta=0, segmentation fails

Probably still an issue for EPIC