fix travis warning

src/client/ua_client_connect.c

@@ -222,7 +222,7 @@ activateSession(UA_Client *client) {
     __UA_Client_Service(client, &request, &UA_TYPES[UA_TYPES_ACTIVATESESSIONREQUEST],
                         &response, &UA_TYPES[UA_TYPES_ACTIVATESESSIONRESPONSE]);
 
-    if(response.responseHeader.serviceResult) {
+    if(response.responseHeader.serviceResult != UA_STATUSCODE_GOOD) {
         UA_LOG_ERROR(client->config.logger, UA_LOGCATEGORY_CLIENT,
                      "ActivateSession failed with error code %s",
                      UA_StatusCode_name(response.responseHeader.serviceResult));