-
-/*
- * ssequal.c -- check if a string is a substring of another
+/* ssequal.c -- check if a string is a substring of another
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
*/
int
-ssequal (char *s1, char *s2)
+ssequal (const char *s1, const char *s2)
{
if (!s1)
s1 = "";