fix possible int overflow

ext/pdo_pgsql/pgsql_driver.c

@@ -1064,6 +1064,11 @@ static PHP_METHOD(PDO, pgsqlGetNotify)
 	if (ms_timeout < 0) {
 		php_error_docref(NULL, E_WARNING, "Invalid timeout");
  		RETURN_FALSE;
+#if ZEND_ENABLE_ZVAL_LONG64
+	} else if (ms_timeout > INT_MAX) {
+		php_error_docref(NULL, E_WARNING, "timeout was shrinked to %d", INT_MAX);
+		ms_timeout = INT_MAX;
+#endif
 	}
 
 	H = (pdo_pgsql_db_handle *)dbh->driver_data;
@@ -1072,7 +1077,7 @@ static PHP_METHOD(PDO, pgsqlGetNotify)
 	pgsql_notify = PQnotifies(H->server);
 
 	if (ms_timeout && !pgsql_notify) {
-		php_pollfd_for_ms(PQsocket(H->server), PHP_POLLREADABLE, ms_timeout);
+		php_pollfd_for_ms(PQsocket(H->server), PHP_POLLREADABLE, (int)ms_timeout);
 
 		PQconsumeInput(H->server);
 		pgsql_notify = PQnotifies(H->server);