Don't write event DTEND if it doesn't have an end date/time
Don't write event DTEND if it doesn't have an end date/time

svn path=/trunk/kdepim/; revision=206671

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