If ARG is not a genuine list, make it a one-element list. */
void
-signal_error (char *s, Lisp_Object arg)
+signal_error (const char *s, Lisp_Object arg)
{
Lisp_Object tortoise, hare;
/* VARARGS 1 */
void
-error (char *m, ...)
+error (const char *m, ...)
{
char buf[200];
int size = 200;