eigvaljpdf not running?

It seems like this code is stale (though maybe my use of it is incorrect). I can't get
`eigvaljpdf(d::GaussianLaguerre, lambda::Vector{Eigenvalue})`
to run in v0.6.2. I'm happy to help update the code but want to make sure I know the intent.
A few questions:
Is `z < 0 && (int(z) - z) < eps()` on line 200 equivalent to `z < 0 && z > -eps()` ?
Should the `beta`s on line 204 be `d.beta`s?

Start by reproducing the v0.6.2 failure for eigvaljpdf(d::GaussianLaguerre, lambda::Vector{Eigenvalue}). Inspect the code around lines 200 and 204, verify the intended condition and beta references, and confirm the function runs correctly once those questions are resolved.

索引モデルが issue の本文から書いたものです。