There seem to be some problems with the sizes of items during copying itmes.

This commit adds some additionial checks to the item copy test. After the copy
the source item is fetched first. Then the source as well as the target item
are checked to have a size > 0 and sizes of both items should be equal.

Currently the item size > 0 check fails for both. (They're both marked with
QEXPECT_FAIL).

svn path=/trunk/KDE/kdepimlibs/; revision=977733