Remove all traces of machine.h and redundant calls to c.h where

Marc G. Fournier <scrappy@hub.org>

Commit: 3c0f8ed4ae8659d754eacb8c458aa45d983b44f2
Author: Marc G. Fournier <scrappy@hub.org>
Date: 1996-08-27T22:15:17Z
Releases: 7.1.1
Remove all traces of machine.h and redundant calls to c.h where
postgres.h already pulled in (postgres.h includes c.h)

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