Fix DUP_NETWORK debug print on error case

Incorrect network id was printed in debug output if DUP_NETWORK
destination network was not found.

Signed-off-by: Jouni Malinen <j@w1.fi>

wpa_supplicant/ctrl_iface.c

@@ -2878,7 +2878,7 @@ static int wpa_supplicant_ctrl_iface_dup_network(
 	ssid_d = wpa_config_get_network(wpa_s->conf, id_d);
 	if (ssid_d == NULL) {
 		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find "
-			   "network id=%d", id_s);
+			   "network id=%d", id_d);
 		return -1;
 	}