Blender Git Commit Log

Bugfix for #2036

Backbuffer selection codes issue on OSX.
On some h/w configs, with "1000s of colors set", the drivers seem to round
colors up or down... whilst until now rounding always was just truncating
bits. This gives errors in writing color codes and reading it back.
The c code only changed for OSX. For other OS's and HW this test could be
done as well.