backport SVN commit 931509 by winterz:

Patch from Csaba.
Revert back a small typo change from 11 years ago which is a difference between the libical's
and kcal's vobject in versit. Obviously, it is not an option to send this to upstream,
but revert back this change. No direct effect on the sources.

svn path=/branches/KDE/4.2/kdepimlibs/; revision=933042