[Fix][win32] Discs that were present at start are not removed from views...

... when ejecting them.

This bug annoyed me for quite some time. Today it must die.
Steps to reproduce the following screenshot:
- disc is present at start up
- remove disc
- insert disc

![screenshot000](https://cloud.githubusercontent.com/assets/2150851/5088830/c8659bfa-6f36-11e4-888e-0459aa9e484a.png)


If we prefer to have ```x:\ ``` instead of ```x: ```, this can be fixed by removing 939/940 https://github.com/xbmc/xbmc/blob/master/xbmc/win32/WIN32Util.cpp#L939