[Vm-dev] Input semaphore signaling on win32

[Igor Stasenko]

I integrated fix. So all images on all platforms could drop event
polling logic (of course they should use proper VMs)
on next release.

And i made a little change comparing to my initial commit,
which not puts event to event buffer unless there's a semaphore
registered to handle them.
See
http://gitorious.org/cogvm/blessed/commit/d52a7e171fc6e5051bd4ba7b751bda1b0e3fb4be
for details


-- 
Best regards,
Igor Stasenko AKA sig.