fix broadcast

src/main/java/fr/insa/clavardator/network/NetDiscoverer.java

@@ -30,12 +30,10 @@ public class NetDiscoverer {
 	public void discoverActiveUsers(String broadcastMessage, ResponseReceivedCallback callback, ErrorCallback errorCallback) {
 		if (responseListener != null)
 			responseListener.stopListening();
-		responseListener = new ResponseListener((ipAddr, data) -> {
-			broadcastSender = new BroadcastSender(broadcastMessage, errorCallback);
-			broadcastSender.start();
-			callback.onResponseReceived(ipAddr, data);
-		}, errorCallback);
+		responseListener = new ResponseListener(callback, errorCallback);
 		responseListener.start();
+		broadcastSender = new BroadcastSender(broadcastMessage, errorCallback);
+		broadcastSender.start();
 	}
 
 	/**