[flexcoders] keyCode decremented by 64 when Control key down on Mac

[ben.clinkinbeard]

Title pretty well covers it but as an example, the keyCode for f/F is
70. If you press Control + F on Mac keyCode returns 6. I tested for
10+ keys and they are all -64 when Control is added. This happens on
Mac only.

What gives?

Thanks,
Ben