add void to function declaration

diff --git a/ykchalresp.c b/ykchalresp.c
index 2a54972eccfaeedcc61d0545adba5afd3df48146..89388cacd7b455fd353d8ea2ef4bdb9c65d18642 100644 (file)
--- a/ykchalresp.c
+++ b/ykchalresp.c
@@ -58,7 +58,7 @@ const char *usage =
        ;
 const char *optstring = "12xvhHYN";
 
-static void report_yk_error()
+static void report_yk_error(void)
 {
        if (ykp_errno)
                fprintf(stderr, "Yubikey personalization error: %s\n",