One more keyboard fix for good measure - still need to address "stuck"

meta key in keyboard demo, but that is because we don't get the "keyup"
event because Windows takes our focus away...


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.0@1447 ea41ed52-d2ee-0310-a9c1-e6b18d33e121