P2P: Fix P2P device signal level type in D-Bus

Signed-off-by: Fabien Marotte <fabienx.marotte@intel.com>
Signed-off-by: Jayant Sane <jayant.sane@intel.com>

wpa_supplicant/dbus/dbus_new_handlers_p2p.c

@@ -1112,7 +1112,7 @@ DBusMessage *wpas_dbus_getter_p2p_peer_properties(DBusMessage * message,
 	if (!wpa_dbus_dict_append_uint16(&dict_iter, "config_method",
 					 info->config_methods))
 		goto err_no_mem;
-	if (!wpa_dbus_dict_append_uint16(&dict_iter, "level",
+	if (!wpa_dbus_dict_append_int32(&dict_iter, "level",
 					 info->level))
 		goto err_no_mem;
 	if (!wpa_dbus_dict_append_byte(&dict_iter, "devicecapability",