Incorrect behavior in from_str_radix

[0e4ef622]

use rust_decimal::prelude::*;
use num_traits::Num;

fn main() {
    // 32 ones
    println!("{:?}", Decimal::from_str_radix("11111111111111111111111111111111", 2));
}

Expected output: Ok(4294967295)
Actual output: Ok(536870912)

The binary representation of the actual output is:
100000000000000000000000000000
That's 1 one followed by 29 zeroes.

[paupino]

It appears this is triggering rounding - which of course, is absolutely incorrect. I can put in a simple fix, however I want to make sure this transitions across different bases.

[paupino]

I think this is actually due to this logic:

if coeff.len() as u32 > MAX_PRECISION {
    maybe_round = true;
    break;
}

This works well when the base is 10+ as it's safe to exit out early. However this is a very naive exit when it's less than base 10.