Avoid freeze if day width is set to zero or less.
Avoid freeze if day width is set to zero or less.

svn path=/trunk/KDE/kdepim/; revision=774900

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