https://bugzilla.gnome.org/show_bug.cgi?id=730190
char zero;
g_return_val_if_fail (G_IS_SOCKET (socket), -1);
+ g_return_val_if_fail (address == NULL || G_IS_SOCKET_ADDRESS (address), -1);
+ g_return_val_if_fail (num_vectors == 0 || vectors != NULL, -1);
+ g_return_val_if_fail (num_messages == 0 || messages != NULL, -1);
+ g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), -1);
+ g_return_val_if_fail (error == NULL || *error == NULL, -1);
if (!check_socket (socket, error))
return -1;