nlteStartingPops bug fix

Several mistakes on conditions in the very rarely used nlteStartingPops path of compute_eq_pops and iterate_lte_ne_eq_pops now corrected.
For compute_eq_pops this path ends up equivalent to simply setting the NLTE or detailed static populations in the SpeciesStateTable after the fact. This path may be needed for iterate_lte_ne_eq_pops when some of the populations are known and need to be taken into account for the electron density.