merge SVN commit 1099019 by winterz:
merge SVN commit 1099019 by winterz:

crash guard in setBodyPartMemento if the memento argument is 0.
possible fix for kolab/issue4187

svn path=/branches/KDE/4.4/kdepim/; revision=1099047

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