do not crash if Part** is null
do not crash if Part** is null

svn path=/trunk/KDE/kdepim/akregator/; revision=788832

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