Internal function for checking that the OM@cpars is formatted correctly

cparscheck(cpars)

## Arguments

cpars

a list of model parameters to be sampled (single parameters are a vector nsim long, first dimension of matrices and arrays must be nsim)

## Value

either an error and the length of the first dimension of the various cpars list items or passes and returns the number of simulations in cpars

T. Carruthers