Merge branch 'master' of https://github.com/MediaBrowser/MediaBrowser

MediaBrowser.Controller/Providers/Music/LastfmAlbumProvider.cs

@@ -14,7 +14,7 @@ namespace MediaBrowser.Controller.Providers.Music
 {
     public class LastfmAlbumProvider : LastfmBaseProvider
     {
-        private static readonly Task<string> BlankId = Task.FromResult("0000");
+        private static readonly Task<string> BlankId = Task.FromResult("");
 
         private readonly IProviderManager _providerManager;
         

MediaBrowser.Controller/Providers/Music/LastfmBaseProvider.cs

@@ -138,7 +138,7 @@ namespace MediaBrowser.Controller.Providers.Music
         protected virtual async Task FetchData(BaseItem item, CancellationToken cancellationToken)
         {
             var id = item.GetProviderId(MetadataProviders.Musicbrainz) ?? await FindId(item, cancellationToken).ConfigureAwait(false);
-            if (id != null)
+            if (!string.IsNullOrWhiteSpace(id))
             {
                 Logger.Debug("LastfmProvider - getting info for {0}", item.Name);