Additionally, fix a bug where a MemoryError in allocating a bytes object could
leave the decompressor object in an invalid state (with its unconsumed_tail
member being NULL).
Patch by Serhiy Storchaka.
If the version of zlib used to compile the zlib module is incompatible
with the one that is actually linked in, then calls into zlib will fail.
This can leave attributes of the z_stream uninitialized, so we must take
care to avoid segfaulting by trying to use an invalid pointer.
Fix by Richard M. Tew.
platforms with a 64-bit long.
The Alpha/Tru64 test problem is a problem in either tarfile or test_tarfile,
not zlib.
crc32 and adler32 return 32-bit values. by using a long thats larger than
32-bits in these functions they were prevented from wrapping around to their
signed 32-bit value that we want them to return in python 2.x.
which made the return value signed. On the Alpha that also lost data
since sizeof(int) != sizeof(long) and apparently adler32/crc32 return
64 bits of data. This change keeps the signedness and continues to store the
data in a long rather than an int as was the case before r61449.
regardless of the native sizeof(long) used in the integer object.
This somewhat odd behavior of returning a signed is maintained in 2.x for
compatibility reasons of always returning an integer rather than a long object.
Fixes Issue1202 for Python 2.6
