*************************************************/
/* Copyright (c) University of Cambridge 1995 - 2018 */
-/* Copyright (c) The Exim Maintainers 2020 */
+/* Copyright (c) The Exim Maintainers 2020 - 2021 */
/* See the file NOTICE for conditions of use and distribution. */
/* Functions for sending messages to sender or to mailmaster. */
fprintf(fp, "References:");
if (h)
{
- uschar * s, * id, * error;
+ const uschar * s;
+ uschar * id, * error;
uschar * referenced_ids[12];
int reference_count = 0;