Float details

[Martin Nilsson (Opera Mini - AFK!) @ Pike (-) developers forum]

So -0.0 is a thing. Should we fix any of these:

> -0.0;
(1) Result: -0.0
> equal(-0.0, 0.0);
(2) Result: 1
> decode_value(encode_value(-0.0));
(3) Result: 0.0
> -0.0 < 0.0;
(4) Result: 0