[issue1202] zlib.crc32() and adler32() return value

[Gregory P. Smith]

Gregory P. Smith <greg at krypto.org> added the comment:

fixed.

3.0 always returns unsigned.
2.6 always returns signed, 2**31...2**31-1 come back as negative integers.

trunk r61449
branches/py3k r61459

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resolution:  -> fixed
status: open -> closed

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