/*
** store an error message in buff like libinn(3) says NNTPconnect does
*/
-static void store_error(char *buff, char *string1, char *string2) {
+static void store_error(char *buff, const char *string1, const char *string2) {
/* we put these in [...] to make it easier to tell them apart
* from messages sent by the server */
snprintf(buff, NNTP_STRLEN, "[%s%s]", string1, string2);