Please describe the problem:
If a user attempts to export a note to a location on their computer where they do not have access, no error is shown and they may falsely assume that the note was saved, delete the note from Tomboy, and their data is now lost.

Steps to reproduce:
- Create a note in tomboy
- Select the tomboy plugins | Export to Html
- Select an existing file (ie /etc/hosts) or a directory where the user has
insufficient rights and click the save button.


Actual results:
The save dialog goes away with no errors.

Expected results:
The user should be presented with an error letting them know that their note was not saved.

Does this happen every time?
Yes.

Other information:
This was originally filed as a bug here: https://bugzilla.novell.com/show_bug.cgi?id=172414

I will attach a potential patch to fix the problem.