[Win32] Drag'n'Drop not working

[Calum]

"file:///C:/The.torrent" becomes "C:\C:\The.torrent"

Problem was introduced with this commit: ​00900fef

Solution will be something like the code below but will need better testing to ensure both Linux and Windows compatibility.

if urlparse(arg).scheme == "file":
    os.path.abspath(url2pathname(urlparse(arg).path))
else:
    path = os.path.abspath(arg)

​http://en.wikipedia.org/wiki/File_URI_scheme

[Calum]

Fix committed to 1.3-stable:​9c9064b2