Avoid needless QString -> const char* casting.
Avoid needless QString -> const char* casting.

svn path=/trunk/kdenetwork/kmail/; revision=25440

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