Log Message:
update to 2.4
from the announcement:
Version 2.4 is a featured release that introduces new functionality as
well as many performance and security improvements.
Main additions are:
-Black point detection from the algorithm disclosed by Adobe
-Added support for transforms on planar data with different stride
-Added a new plug-in type for optimizing full transforms
-Linear (gamma 1.0) profiles can now operate in unbounded mode
-Added "half" float support

approved by the maintainer