don't dereference NULL pointer

diff --git a/src/mod_auth_kerb.c b/src/mod_auth_kerb.c
index 18d2171..7ae9bd4 100644 (file)
--- a/src/mod_auth_kerb.c
+++ b/src/mod_auth_kerb.c
@@ -921,7 +921,7 @@ int authenticate_user_krb5pwd(request_rec *r,
 end:
    log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
              "kerb_authenticate_user_krb5pwd ret=%d user=%s authtype=%s",
-             ret, (MK_USER)?MK_USER:"(NULL)", MK_AUTH_TYPE);
+             ret, (MK_USER)?MK_USER:"(NULL)", (MK_AUTH_TYPE)?MK_AUTH_TYPE:"(NULL)");
    if (client)
       krb5_free_principal(kcontext, client);
    if (ccache)