Mark some more variables as static or include the appropriate header

Peter Eisentraut <peter_e@gmx.net>

Commit: 66c04c981dfe7c1d1e633dddcecf01982d0bde65
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2014-02-09T02:21:46Z
Releases: 9.4.0
Mark some more variables as static or include the appropriate header

Detected by clang's -Wmissing-variable-declarations.

From: Andres Freund <andres@anarazel.de>

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