void mutt_expand_fmt (char *, size_t, const char *, const char *);
void mutt_expand_link (char *, const char *, const char *);
void mutt_fix_reply_recipients (ENVELOPE *env);
-void mutt_folder_hook (char *);
+void mutt_folder_hook (const char *);
void mutt_format_string (char *, size_t, int, int, int, char, const char *, size_t, int);
void mutt_format_s (char *, size_t, const char *, const char *);
void mutt_format_s_tree (char *, size_t, const char *, const char *);