Alert user if likelihood weights is too short

[kdund]

alea/alea/models/blueice_extended_model.py

Line 395 in 1387899

likelihood_weights = likelihood_config.get("likelihood_weights", None)

If an unwary user sets the likelihood_weights to be too short, the evaluation might skip ancillary terms, for example.

[kdund]

you are not allowed to laugh at me for having spent an hour on discovering this was the problem I had

[hammannr]

Good catch, thanks @kdund. Should be a quick fix!