NTP: Fix extracting the poll value

Use EXTRACT_S_1 for ppoll (signed).

diff --git a/print-ntp.c b/print-ntp.c
index 65d41fb76045b98c101bc64215df3e68f920ff2f..de6ec6d951d2cfe59cc8cf01936a6db693e607e0 100644 (file)
--- a/print-ntp.c
+++ b/print-ntp.c
@@ -276,7 +276,7 @@ ntp_time_print(netdissect_options *ndo,
 
        ND_TCHECK_1(bp->ppoll);
        ND_PRINT(", poll %d", EXTRACT_S_1(bp->ppoll));
-       p_poll(ndo, EXTRACT_U_1(bp->ppoll));
+       p_poll(ndo, EXTRACT_S_1(bp->ppoll));
 
        ND_TCHECK_1(bp->precision);
        ND_PRINT(", precision %d", EXTRACT_S_1(bp->precision));