[Bug libstdc++/123409] negative_binomial_distribution::param() does not modify member gamma_distribution

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123409

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Michał L. from comment #0)
> Should I file separate reports for those two?

No, that's not necessary.