Fix connected link check

src/AutoPilotPlugins/PX4/AirframeComponentController.cc

@@ -94,7 +94,15 @@ void AirframeComponentController::changeAutostart(void)
 {
     LinkManager* linkManager = LinkManager::instance();
 	
-    if (linkManager->getLinks().count() > 1) {
+	// This shouldn't theoretically be needed since a disconnected link should be deleted. But
+	// for some reason multiple links are coming up.
+	int connectedLinkCount = 0;
+	foreach (LinkInterface* link, linkManager->getLinks()) {
+		if (link->isConnected()) {
+			connectedLinkCount++;
+		}
+    }
+	if (connectedLinkCount > 1) {
 		QGCMessageBox::warning("Airframe Config", "You cannot change airframe configuration while connected to multiple vehicles.");
 		return;
 	}