Always false float comparisons

[Ecstatic Coder via Digitalmars-d]

> So what you really want is: signed array lengths. You only have 
> a use for the sloppy conversion, because D doesn't have signed 
> array lengths.

Yes and no. Signed safety is better, but the current behavior 
works too.

Honestly I don't care if the bit maniacs want 8 million terabytes 
more for their strings, as long as I can safely ignore that 
implementation detail.