Fix confusion between ObjectType and ObjectClass

Alvaro Herrera <alvherre@alvh.no-ip.org>

Commit: 6a76edb1880d99744453dd275f30e0361281caab
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Date: 2013-04-11T14:59:47Z
Releases: 9.3.0
Fix confusion between ObjectType and ObjectClass

Per report by Will Leinweber and Peter Eisentraut

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