Only apply old column widths if there are valid sizes (here too)
Only apply old column widths if there are valid sizes (here too)

svn path=/trunk/KDE/kdepim/akregator/; revision=776357

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