Fix error reporting

main.go

@@ -23,7 +23,7 @@ var (
 	).Author(
 		"Lukas Burgey",
 	).Version(
-		"v2.1.0",
+		"v2.1.1",
 	)
 	cmdStart         = app.Command("start", "Starts the client in its normal operation mode.").Default()
 	cmdDeregister    = app.Command("deregister", "Before disabling the client: Use deregister to inform the backend that the client ceases operation.")
@@ -169,7 +169,7 @@ func main() {
 	switch cmd {
 	case "start":
 		// sync the config with the backend
-		if conf.Sync() != nil {
+		if err := conf.Sync(); err != nil {
 			log.Printf("[Conf] Error synchronizing configuration: %s", err)
 			return
 		}