Python/Cygwin PyOS_InputHook

[gb at cs.unc.edu]

Jason's answer and some a red-herring that looked like a bug in python
led me to the truth.

Turns out the problem was in the pygist extension module. It has a
redundant declaration of PyOS_InputHook. This is not needed because it
is properly declared (with the DL_IMPORT trick) in pythonrun.h. Just
eliminating the line from the pygist extension module fixed things
up. It runs with an X server nicely now. 

Thanks
gb