commit -- fixed #522

[sterwill]

It was such an easy fix to a silly little mistake.  We were letting
GTK have all keypresses with all MOD keys turned on.  I had no 
idea MOD5 was usually used for Num Lock (and MOD3 for Scroll Lock,
says xkeycaps), since I never keep it on.  This bug was a 5 minute
fix--I can't believe it stuck around this long before someone noticed
it was a numlock related bug.

-- 
Shaw Terwilliger