Fixed colorWithFlatVersionFrom: sets colors with alpha = 0

[wimbledon]

Closes #70

[bre7]

It doesn't set the alpha to 0, it get's the color's current alpha and computes a flat color taking said value into account instead of a hardcoded 1 (Similar to #50)

[wimbledon]

The problem is that it returns alpha==0.0f when I pass in a flatColor (i.e. FlatBlue) to [color getLightness:nil valueForA:nil valueForB:nil alpha:&colorAlpha]; right now.
How would you recommend solving the bug #70?

[bre7]

[color getLightness:nil valueForA:nil valueForB:nil alpha:&colorAlpha];
colorAlpha = colorAlpha > 0 ? colorAlpha : 1.0;
return [[self class] colorWithFlatVersionOf:color withAlpha:colorAlpha];

[bre7]

Thanks

@ViccAlexander version bump ?

[vicc]

@bre7 Yup. Just bumped it up to 2.0.4.