[rfc] time.gmtime() does not accept negative numbers on win32

[Alexander Belchenko]

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Aaron, annotate says that you is the author of test_timestamp.py.
Unfortunately one of the test fails on win32 because gmtime()
does not accept negative seconds (pre-1970 year).
This error raised both on 2.4 and 2.5, so I assume it's
a limitation of win32 C runtime.

Python 2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> time.gmtime(0)
(1970, 1, 1, 0, 0, 0, 3, 1, 0)
>>> time.gmtime(-1)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: (22, 'Invalid argument')

How the best to change this test:

        self.assertEqual('1969-12-31 19:00:00 -0500',
            timestamp.format_patch_date(0, -5 * 3600))

Any non-zero value is OK for you? Per example such change:

        self.assertEqual('1970-01-01 05:00:00 -0500',
            timestamp.format_patch_date(5 * 3600, -5 * 3600))


[µ]
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