OM@cpars is formatted correctlyInternal function for checking that the OM@cpars is formatted correctly
cparscheck(cpars)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
a list of model parameters to be sampled (single parameters are
a vector nsim long, first dimension of matrices and arrays must be nsim)
T. Carruthers