Better guess for decoration height
Better guess for decoration height

svn path=/trunk/KDE/kdepim/; revision=829242

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