Fix crash when we try to rename filter and list of pattern is empty MERGE: e4/e5/3.5
Fix crash when we try to rename filter and list of pattern is empty
MERGE: e4/e5/3.5

svn path=/branches/KDE/4.4/kdepim/; revision=1105860

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