If THcHelicity is told about the THcHelicityScaler object with
the SetHelicityScaler method, it will use helicity scaler events
to jump start generating the seed
When beam off, helicity decoding can get lost if the helicity_freq
parameter is not very close to the actual helicity reversal frequency
(which seems to drift). THcHelicity now calculates a recommended value
of helicity_freq.