[Distutils] Change in build_ext breaks code

[M.-A. Lemburg]

A recent change (fix) in build_ext.py breaks code which wants
to override .finalize_options():

revision 1.68.2.1
date: 2001/03/31 16:09:32;  author: moshez;  state: Exp;  lines: +20 -2
- #233253 - distutils/command/build_ext.py - the --define and --undef options
            didn't work, whether specified on the command-line or in setup.cfg.
- distutils/command/build_ext.py - make docstrings raw
- #128930 - distutils/command/build_ext.py - split rpath argument
Suggested by AMK, but had to be massaged a bit from the cvs diff

The proper thing to do would be to test .define and .undefine
for strings (which are set by the command-line args) before
tweaking them into tuples...

-- 
Marc-Andre Lemburg
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