cosmetic improvements in client securechannel renewal

src/client/ua_client_connect.c

@@ -133,7 +133,7 @@ processDecodedOPNResponse(UA_Client *client, UA_OpenSecureChannelResponse *respo
 static UA_StatusCode
 openSecureChannel(UA_Client *client, UA_Boolean renew) {
     /* Check if sc is still valid */
-    if(renew && client->nextChannelRenewal - UA_DateTime_nowMonotonic() > 0)
+    if(renew && client->nextChannelRenewal > UA_DateTime_nowMonotonic())
         return UA_STATUSCODE_GOOD;
 
     UA_Connection *conn = &client->connection;