Fix a crash in 'Folder->Remove duplicate messages'
Fix a crash in 'Folder->Remove duplicate messages'

svn path=/trunk/KDE/kdepim/; revision=885208

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