add library monitor error handling

MediaBrowser.Server.Implementations/IO/LibraryMonitor.cs

@@ -105,9 +105,16 @@ namespace MediaBrowser.Server.Implementations.IO
             _tempIgnoredPaths.TryRemove(path, out val);
 
             if (refreshPath)
+            {
+                try
                 {
                     ReportFileSystemChanged(path);
                 }
+                catch (Exception ex)
+                {
+                    Logger.ErrorException("Error in ReportFileSystemChanged for {0}", ex, path);
+                }
+            }
         }
 
         /// <summary>