Nestle likely bug

[sdhawan21]

Fitting some data with a IIn template gives an error with nestle due to a negative h.

"""
File "/Users/suhaildhawan/workspaces/LSST/time_delays/core-collapse/simulate_sntd.py", line 43, in
fitCurves=sntd.fit_data(misn,snType=snType,models=template,bands=filt_ls,
File "/Users/suhaildhawan/.local/lib/python3.9/site-packages/sntd/fitting.py", line 568, in fit_data
curves = _fitparallel(args)
File "/Users/suhaildhawan/.local/lib/python3.9/site-packages/sntd/fitting.py", line 2725, in _fitparallel
res, fit = sncosmo.nest_lc(fit_table, tempMod, [x for x in args['params'] if x in tempMod.param_names],
File "/opt/anaconda3/lib/python3.9/site-packages/sncosmo/fitting.py", line 1099, in nest_lc
res = nestle.sample(loglike, prior_transform, ndim, npdim=npdim,
File "/Users/suhaildhawan/.local/lib/python3.9/site-packages/nestle.py", line 985, in sample
raise RuntimeError("Negative h encountered (h={}). Please report "
RuntimeError: Negative h encountered (h=-8.102136181477137e+23). Please report this as a likely bug.

"""