checkedint call removal

[bearophile via Digitalmars-d]

> The purpose of safe integral operations like muls() is to 
> detect overflow bugs at run-time. If they don't detect bugs, 
> they are not useful.

I think it detects the overflow correctly even if you use the 
(uint, int) argument pair, because the usual conversions are 
used, and I think the mulu is called, that returns the overflow 
boolean as true.

Bye,
bearophile