embree/embree — pull request #8 by selcott (2014-08-19 02:11:03+00:00)
Title: Color4 constructor from Col3c, set alpha to 1.

Color4 constructor from Col3c initialized the fourth component to 1/255.
This is unintuitive and inconsistent with the overloaded constructor
from Col3f, which initializes the fourth component to 1.0.