pgsqlSetNoticeCallback: cleanup on pgsql_handle_closer

Fix to what @ranvis noticed in php#4823 (comment)

Author: outtersg

ext/pdo_pgsql/pgsql_driver.c

@@ -233,6 +233,7 @@ static int pgsql_handle_closer(pdo_dbh_t *dbh) /* {{{ */
 {
 	pdo_pgsql_db_handle *H = (pdo_pgsql_db_handle *)dbh->driver_data;
 	if (H) {
+		pdo_pgsql_cleanup_notice_callback(H);
 		if (H->server) {
 			PQfinish(H->server);
 			H->server = NULL;