telemetry fix gate for telemetry stream removed

app/test/transport/msp/msp_flight_controller_link_test.dart

@@ -12,7 +12,10 @@ import 'package:dmc_app/transport/msp/msp_frame_decoder.dart';
 /// Beantwortet jede ueber [transport] gesendete MSP-Anfrage sofort mit einer
 /// synthetischen Antwort - simuliert den Flightcontroller, ohne echte
 /// Hardware (Doku Kommunikationsschicht Abschnitt 9).
-Timer _startFakeFlightController(LoopbackTransport transport) {
+Timer _startFakeFlightController(
+  LoopbackTransport transport, {
+  int fixType = 3,
+}) {
   var answered = 0;
   return Timer.periodic(const Duration(milliseconds: 5), (_) {
     while (answered < transport.sentData.length) {
@@ -24,7 +27,7 @@ Timer _startFakeFlightController(LoopbackTransport transport) {
       switch (request.function) {
         case MspCommands.rawGps:
           final d = ByteData(18);
-          d.setUint8(0, 3); // fixType: 3D-Fix
+          d.setUint8(0, fixType); // fixType: 3 = 3D-Fix, 0 = kein Fix
           d.setUint8(1, 11);
           d.setInt32(2, 525200000, Endian.little); // lat 52.52
           d.setInt32(6, 134050000, Endian.little); // lon 13.405
@@ -66,6 +69,8 @@ void main() {
 
       expect(frame.lat, closeTo(52.52, 1e-6));
       expect(frame.lon, closeTo(13.405, 1e-6));
+      expect(frame.hasFix, isTrue);
+      expect(frame.numSat, 11);
       expect(frame.altitudeM, closeTo(50.0, 1e-6));
       expect(frame.speedMs, closeTo(5.0, 1e-6));
       expect(frame.headingDeg, closeTo(270.0, 1e-6));
@@ -76,6 +81,25 @@ void main() {
     timeout: const Timeout(Duration(seconds: 5)),
   );
 
+  test(
+    'subscribeTelemetry() liefert auch ohne GPS-Fix ein Frame (Strom wird '
+    'nicht auf einen Fix gegated)',
+    () async {
+      final transport = LoopbackTransport();
+      final responder = _startFakeFlightController(transport, fixType: 0);
+      final link = MspFlightControllerLink(transport: transport);
+
+      await link.connect();
+      final frame = await link.subscribeTelemetry().first;
+
+      expect(frame.hasFix, isFalse);
+
+      await link.disconnect();
+      responder.cancel();
+    },
+    timeout: const Timeout(Duration(seconds: 5)),
+  );
+
   test('readActiveWaypointIndex() fragt MSP_NAV_STATUS direkt ab', () async {
     final transport = LoopbackTransport();
     final responder = _startFakeFlightController(transport);