[z2043] Use fabs instead of abs for float type.

On some platforms abs has only int overload exists.

Signed-off-by: stfx <stfx@hotmail.de>

(based on commit a4fe021)

Signed-off-by: Nighoo <nighoo@overninethousand.de>

(based on commit [s1656] - 9da3f2f)