This patch makes some cleanups to contrib/ to silence some sparse

Neil Conway <neilc@samurai.com>

Commit: 1b3e769682141a7c954f5c1603756d10fe57b667
Author: Neil Conway <neilc@samurai.com>
Date: 2004-11-09T06:09:40Z
Releases: 8.0.0
This patch makes some cleanups to contrib/ to silence some sparse
warnings:

- remove pointless "extern" keyword from some function definitions in
contrib/tsearch2

- use "NULL" not "0" as NULL pointer in contrib/tsearch,
contrib/tsearch2, contrib/pgbench, and contrib/vacuumlo

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