python - pq: Bump version and update tests.

Log Message:
-----------
Bump version and update tests.

Modified Files:
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pq:
setup.py (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/setup.py.diff?r1=1.8&r2=1.9)
pq/test:
buffer.py (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/test/buffer.py.diff?r1=1.3&r2=1.4)