`seth --to-fix`: numerical result out of range

[d-xo]

If I call seth --to-fix with a large number, and a <decimals> arg that is larger than the number of digits in the input I get an error from printf:

> seth --to-fix 256 $(seth --max-uint)
0.printf: ‘0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff’: Numerical result out of range
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000009223372036854775807