small fix

iTasksTTY.icl

@@ -77,6 +77,7 @@ serialDeviceBackgroundTask enc dec rw iworld
 		(Error e, iworld) = (Error $ exception "share couldn't be read", iworld)
 		//We need to stop
 		(Ok (_,_,True), iworld) = (Error $ exception "I have to stop...", iworld)
+
 		(Ok (r,s,ss), iworld)
 		# (Just (TTYd tty bgid)) = iworld.resources
 		# tty = writet (map enc s) tty
@@ -84,7 +85,7 @@ serialDeviceBackgroundTask enc dec rw iworld
 			(False, tty) = ([], tty)
 			(_, tty) = appFst (pure o dec) $ TTYreadline tty
 		# iworld = {iworld & resources=Just (TTYd tty bgid)}
-		| isEmpty ml = (Ok (), iworld)
+		| isEmpty ml && isEmpty s = (Ok (), iworld)
 		= case write (r++ml,[],False) rw iworld of
 			(Error e, iworld) = (Error $ exception "share couldn't be written", iworld)
 			(Ok _, iworld) = (Ok (), iworld)