python - be: Default free to false.

Log Message:
-----------
Default free to false.
(HeapTuple_FromTupleDescAndPySequence seems broken, and the From-Iterable variant
seems more general, so it is likely that From-Sequence will simply be removed)

Modified Files:
--------------
be/src:
tif.c (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/tif.c.diff?r1=1.7&r2=1.8)