adodb: check for Postgres 8.1

See Eduforge #2318 or LP #547951.

Bug 1384473

(cherry picked from commit 4bdafccb)

Change-Id: I0e38e7f4f4e8da35f6c9f8e728213c2218e9a36f
Signed-off-by: Francois Marier <francois@catalyst.net.nz>
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>

htdocs/lib/adodb/drivers/adodb-postgres64.inc.php

@@ -129,11 +129,8 @@ class ADODB_postgres64 extends ADOConnection{
 
 	function ServerInfo()
 	{
-		if (isset($this->version)) return $this->version;
-
 		$arr['description'] = $this->GetOne("select version()");
 		$arr['version'] = ADOConnection::_findvers($arr['description']);
-		$this->version = $arr;
 		return $arr;
 	}