Mark variables 'static' where possible. Move GinFuzzySearchLimit to ginget.c

Heikki Linnakangas <heikki.linnakangas@iki.fi>

Commit: 30b96549ab41ce23399256d4ea9723a05c139558
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: 2013-12-16T09:41:17Z
Releases: 9.4.0
Mark variables 'static' where possible. Move GinFuzzySearchLimit to ginget.c

Per "clang -Wmissing-variable-declarations" output, posted by Andres Freund.
I didn't silence all those warnings, though, only the most obvious cases.

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