Use pg_version only if php>=5.0

Author: sergey-dryabzhinsky

kvstorage-pgsql.inc

@@ -38,6 +38,7 @@ class KVStoragePgsql
 
     public function version(){
 	if (!$this->available) return '-.-.-';
+	if (PHP_VERSION<'5.0') return '-.-.-';
 	$v=pg_version($this->conn);
 	if($v) return $v['server'];
     }

pgsql.inc

@@ -36,6 +36,7 @@ function get_pgsql_version()
 {
     $c = get_pgsql_conn();
     if ($c){
+	if (PHP_VERSION<'5.0')return '-.-.-';
         $info = pg_version($c);
 //	print_r($info);
 	if (isset($info["server"]))