Challenge: write a really really small front() for UTF8

[JR]

On Monday, 24 March 2014 at 07:53:11 UTC, Chris Williams wrote:
> On Sunday, 23 March 2014 at 21:23:18 UTC, Andrei Alexandrescu 
> wrote:
>> Here's a baseline: http://goo.gl/91vIGc. Destroy!
>>
>> Andrei
>
> http://goo.gl/TaZTNB

>  for (int i = 1; i < len; i++) {

size_t, ++i! :>

(optimized away but still, nitnit pickpick)