Crash on accessing to .config in Windows

[T.R]

When gajim access to the .config file (closing chat window, changing preferences.. ), program crashes with the error message:

[Errno 2] No such file or directory: u'C:\\Documents and Settings\\Master Yoda\\Data aplikac\u0102\xad\\Gajim\\.Config'

There is only "config" in this directory, so I renamed it to ".Config" as requested in error message, but nothing has changed.

[junglecow]

Dup of #2812