merge SVN commit 1021337 by winterz:
add a crash guard in selectedSernums() that seems to help fix
the following part of kolab/issue3833
- Create imap folder
- Copy some mails in it
- Sync
- Create fav.
- Rename folder
- Sync
- Click on a mail
svn path=/tags/kdepim/enterprise35.0.20090807.1008353/kdepim/; revision=1021342