Add an apidox comment to setRootIndex.
Add an apidox comment to setRootIndex.


svn path=/trunk/playground/pim/kjotsrewrite/akonadi_next/; revision=908243

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