muninpgplugins - muninpgplugins: fix typo in pg_stat_database per report

Log Message:
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fix typo in pg_stat_database per report from Magnus Hagander.
tag 0.2.2

Modified Files:
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muninpgplugins:
ChangeLog (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/muninpgplugins/muninpgplugins/ChangeLog.diff?r1=1.8&r2=1.9)
pg__stat_database (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/muninpgplugins/muninpgplugins/pg__stat_database.diff?r1=1.3&r2=1.4)