Allow negative task times.  Fixes data loss bug.
Allow negative task times.  Fixes data loss bug.

CCMAIL: 81610@bugs.kde.org
CCMAIL: tamas@komaromi-komaromi.hu

svn path=/trunk/kdepim/; revision=322694

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