[pygtk] FileChooserButton forgets changed file

[Jason Heeris]

> I couldn't reproduce what you're seeing unless I'm doing something wrong, which is likely.

Basically, run the script, select a file, click "Check". Keep the app
open, but change the contents of the selected file and save it. Keep
clicking "check" and the file name has changed to another one in the
directory. (But if there's no other file in the directory with your
first file, it doesn't change!)

I see this on Debian (pygtk 2.17.0) and Windows (git, window branch).

> self.fcb.get_file().get_path() instead of self.fcb.get_filename()

No difference :/

- Jason