python - pq: Reference pack directly to avoid function overhead.

Log Message:
-----------
Reference pack directly to avoid function overhead.
(Removes LONG())

Modified Files:
--------------
pq/src:
element3.py (r1.12 -> r1.13)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/src/element3.py.diff?r1=1.12&r2=1.13)