flex_negllh_var: calculate the negative log-likelihood with PBT, GSI...
In delomast/devMCpbt: What the Package Does in One 'Title Case' Line

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1 2	flex_negllh_var(params, nPBT, nGSI, ohnc, t, utGSI, ohnc_gsi, utVar, ohnc_var, nCat)

`params`	vector of paramaters to optimize
`nPBT`	number of pbt groups to estimate
`nGSI`	number of GSI groups to estimate
`ohnc`	vector of number of observed (PBT assigned) hatchery fish in each PBT and GSI group (gsi groups should be 0)
`t`	vector of tag rates for all PBT and GSI groups (gsi groups should be 0)
`utGSI`	vector of number of un-PBT assigned fish in each GSI group
`ohnc_gsi`	matrix of counts of fish GSI assigned to various groups
`utVar`	matrix of numbers of un-PBT assigned fish in each GSI group (row) x category of the variable (column)
`ohnc_var`	matrix of counts of PBT-assigned fish in each category (rows are PBT groups)
`nCat`	the numbers of categories in the variable