[bug r2674] Crash when delete stop from schedule
How to reproduce:
1. Load ABCcrash.sve
2. Delete "stop B" from line 1
3. Close schedule window
Result:
Crash
Message: vehikel_t::remove_stale_freight(): called
FATAL ERROR: minivec_tpl<T>::[]
index out of bounds: 2 not in 0..1
Aborting program execution ...