Add explicit casts between int4 and boolean. Patch from Sean Chittenden,

Neil Conway <neilc@samurai.com>

Commit: 5285b3576316b6ff6cd02834b63f0a1f3f5b3e08
Author: Neil Conway <neilc@samurai.com>
Date: 2005-02-27T08:31:30Z
Releases: 8.1.0
Add explicit casts between int4 and boolean. Patch from Sean Chittenden,
editorializing by Neil Conway. Catalog version bumped.

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