Don't crash when called from cleanupImapFolders()
Don't crash when called from cleanupImapFolders()

svn path=/trunk/kdepim/; revision=310702

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