Update adodb-pdo_pgsql.inc.php (#366)

Corrected a Postgresql SQL query that was deprecated after PG 9

vendor/adodb/adodb-php/drivers/adodb-pdo_pgsql.inc.php

@@ -60,7 +60,7 @@ class ADODB_pdo_pgsql extends ADODB_pdo {
 	var $_genIDSQL = "SELECT NEXTVAL('%s')";
 	var $_genSeqSQL = "CREATE SEQUENCE %s START %s";
 	var $_dropSeqSQL = "DROP SEQUENCE %s";
-	var $metaDefaultsSQL = "SELECT d.adnum as num, d.adsrc as def from pg_attrdef d, pg_class c where d.adrelid=c.oid and c.relname='%s' order by d.adnum";
+	var $metaDefaultsSQL = "SELECT d.adnum as num, pg_get_expr(d.adbin, d.adrelid) as def from pg_attrdef d, pg_class c where d.adrelid=c.oid and c.relname='%s' order by d.adnum";
 	var $random = 'random()';		/// random function
 	var $concat_operator='||';