Binomial::sample panics with extreme parameters

```rust
let distr = Binomial::new(1 << 31, f64::MIN_POSITIVE).unwrap();
let x = thread_rng().sample(distr);
println!("{}", x);
```
 panics with `Uniform::new called with low >= high` at:
https://github.com/rust-random/rand/blob/1f4507a8e1cf8050e4ceef95eeda8f64645b6719/rand_distr/src/binomial.rs#L180