If downloading online-service track listing fails, then stop loader and show error.

ChangeLog

@@ -77,6 +77,8 @@
    for main browsers.
 7. When reading lines from user mpd.conf file, read as utf-8.
 8. Reset devices and online-services models when artist-view cover size changes.
+9. If downloading online-service track listing fails, then stop loader and show
+   error.
 
 1.3.2
 -----

online/onlineservice.cpp

@@ -356,7 +356,9 @@ void OnlineService::applyUpdate()
 
 void OnlineService::loaderError(const QString &msg)
 {
+    loaded=true;
     lProgress=0;
+    emit error(data()+QLatin1String(" - ")+msg);
     setStatusMessage(msg);
     stopLoader();
     setBusy(false);