[PEAK] access violation with py24/msvc compiler

[Phillip J. Eby]

FYI, this issue is now moot; I have removed all uses of kjbuckets in PEAK, 
and have changed setup.py to only build kjbuckets if it is explicitly 
requested to do so (as a convenience for people with other code that 
depends on it).

I will probably go ahead and release an 0.5a4 version soon, based on Python 
2.3, as I've also removed all legacy support for Python 2.2.  (Because 
replacing kjbuckets needed some Python 2.3 features.)