fix startup when feeds.opml was not created yet.
fix startup when feeds.opml was not created yet.

svn path=/trunk/kdepim/akregator/; revision=382662

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi