Fix for multiple identical physical locations

For some reason, physical locations were coming through twice.

MediaBrowser.Controller/Entities/CollectionFolder.cs

@@ -149,7 +149,7 @@ namespace MediaBrowser.Controller.Entities
 
             try
             {
-                locationsDicionary = PhysicalLocations.ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
+                locationsDicionary = PhysicalLocations.Distinct().ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
             }
             catch (IOException ex)
             {
@@ -181,7 +181,7 @@ namespace MediaBrowser.Controller.Entities
 
             try
             {
-                locationsDicionary = PhysicalLocations.ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
+                locationsDicionary = PhysicalLocations.Distinct().ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);
             }
             catch (IOException ex)
             {