Fixed Content insert fails on 3.2 Postgresql 9.0  

http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=32822&start=0
Update postgresql.php

small fix when installing components
Merge pull request #3279 from vdespa/patch-4

[#32822] Fixed Content insert fails on 3.2 Postgresql 9.0