Remove extra comparison in while loop

[sbrichardson]

Since seems to be used with string lengths only, a val < 0 isn't possible. Loop will end at 0 naturally. Since the current code is using i-- (vs --i), if i === 0 initially, the while loop won't run. If a number < 0 is expected, I'd propose checking before the loop vs each iteration.

// current
while (i-- > 0) // ...

// proposed
while (i--) // ...

[fabiosantoscode]

It's always a positive number, so this change goes in.

Thanks!