python - be: Clear up warnings.

Log Message:
-----------
Clear up warnings.

Primarily some unitialized variable warnings that deal with PG_TRY/PG_CATCH and
some missing headers and prototypes.

Modified Files:
--------------
be/include/pypg:
type.h (r1.11 -> r1.12)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/include/pypg/type.h.diff?r1=1.11&r2=1.12)
be/src:
call.c (r1.12 -> r1.13)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/call.c.diff?r1=1.12&r2=1.13)
function.c (r1.18 -> r1.19)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/function.c.diff?r1=1.18&r2=1.19)
heaptuple.c (r1.14 -> r1.15)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/heaptuple.c.diff?r1=1.14&r2=1.15)
pl.c (r1.32 -> r1.33)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/pl.c.diff?r1=1.32&r2=1.33)
type.c (r1.21 -> r1.22)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type.c.diff?r1=1.21&r2=1.22)
be/src/call:
trigger.c (r1.11 -> r1.12)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/call/trigger.c.diff?r1=1.11&r2=1.12)
be/src/type:
array.c (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type/array.c.diff?r1=1.5&r2=1.6)
bitwise.c (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type/bitwise.c.diff?r1=1.8&r2=1.9)
geometric.c (r1.9 -> r1.10)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type/geometric.c.diff?r1=1.9&r2=1.10)
object.c (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type/object.c.diff?r1=1.7&r2=1.8)
record.c (r1.9 -> r1.10)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type/record.c.diff?r1=1.9&r2=1.10)
textual.c (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type/textual.c.diff?r1=1.6&r2=1.7)