Don't go into an infinite loop, when "INBOX" as prefix to the folders is entered and the INBOX has subfolders.
Don't go into an infinite loop, when "INBOX" as prefix to the folders is entered
and the INBOX has subfolders.

svn path=/trunk/kdenetwork/kmail/; revision=110592

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