Fix Networkbrowser Plugin - Empty Folders

Hi,

Reference is topic: http://openpli.org/forums/topic/20327-cifs-mount-problem-share-dvd-on-win-pc/page__hl__cifs__fromsearch__1

Attached Patch fixes Issue "Empty Folders" with

- Mounted DVDs on PC via CIFS Share
- Mounted DVD-Subfolders on PC via CIFS-Share
- NAS-Shares via CIFS