Fix MediaCoversUpdatedEvent broadcast

Cleans exception when updating media covers expects a series Id.

src/NzbDrone.Api/Series/MovieModule.cs

@@ -239,7 +239,7 @@ namespace NzbDrone.Api.Movie
 
         public void Handle(MediaCoversUpdatedEvent message)
         {
-            //BroadcastResourceChange(ModelAction.Updated, message.Movie.Id);
+            BroadcastResourceChange(ModelAction.Updated, message.Movie.Id);
         }
     }
 }

src/NzbDrone.Api/Series/SeriesModule.cs

@@ -236,7 +236,7 @@ namespace NzbDrone.Api.Series
 
         public void Handle(MediaCoversUpdatedEvent message)
         {
-            BroadcastResourceChange(ModelAction.Updated, message.Series.Id);
+            //BroadcastResourceChange(ModelAction.Updated, message.Series.Id);
         }
     }
 }