Fix signal order problem

src/Vehicle/MultiVehicleManager.cc

@@ -194,14 +194,10 @@ void MultiVehicleManager::_autopilotPluginReadyChanged(bool pluginReady)
         return;
     }
     
-    if (_activeVehicle) {
+    if (autopilot->vehicle() == _activeVehicle) {
-        if (_activeVehicle->autopilotPlugin() == autopilot) {
         _parameterReadyVehicleAvailable = pluginReady;
         emit parameterReadyVehicleAvailableChanged(pluginReady);
     }
-    } else {
-        qWarning() << "Why no active vehicle?";
-    }
 }
 
 void MultiVehicleManager::setHomePositionForAllVehicles(double lat, double lon, double alt)