fix: close port 0 at correct place

lua/CC Tweaked/tutel/tutel-client.lua

@@ -98,9 +98,7 @@ end
 -- scan
 function handleScan(keys)
     -- to-do: check and maybe inform if turtle is already linked to another host
-
     HOST_CHANNEL = keys.hostChannel
-    modem.close(0)
 
     log.info("received scan, host channel assigned to %d, replying...", keys.hostChannel)
 
@@ -129,6 +127,7 @@ function handleRegister(keys)
 
     log.info("received register, host assigned channel: %d", keys.turtleChannel)
     modem.open(keys.turtleChannel)
+    modem.close(0)
 end
 
 declareCommandHandler("REGISTER", handleRegister, { ["id"] = "number", ["turtleChannel"] = "number" })