[Pyallegro] atexit problems in windows

[C R. <re...@ho...>]

I was about to create a set of allegro bindings in python when it occurred 
to me that I should check whether it had already been done, first.

Thank you, you saved me a lot of work :)

I had problems getting pyallegro to work in windows. I'm running Windows XP. 
I compile in Cygwin. I compile _alpy into a .pyd file (python DLL). I run 
Python 2.2.2 in Windows (not cygwin). Allegro is compiled as a DLL for 
mingw32, and I create a .a archive for linking using dlltool. When I run 
python, I get thus far:

>>>import alpy
>>>alpy.init_allegro()

A new window is created, but not displayed (it appears in the taskbar only) 
and Python does not accept any more keyboard input. I have to kill python 
and the new window at this point.

The problem, which I have hacked a fix for, seems to be because of the 
atexit function. I had to change _alpymodule.c to call

    install_allegro(alpy_system, &errno, NULL);

instead of

    install_allegro(alpy_system, &errno, atexit);

Naturally this is a poor solution, since it doesn't call allegro's cleanup 
routines on exit. I wonder if the behavior of atexit could be simulated 
within DllMain to achieve the right result?

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