merge SVN commit 1088947 by winterz:

kolab tasks that "float" have a due time of 00:00, so make sure to check
that also when deciding if the time associated box should be checked
when reading in the Todo.
fixes the second part of kolab/issue4063

svn path=/tags/kdepim/enterprise35.0.20100205.1085672/kdepim/; revision=1088948