In the words of Stephan Kulow <email@example.com>:
"That's the penalty of using private interfaces".
Fix build with Qt 3.0.5 by using a patch committed to KDE CVS. It was
backported to KDE_3_0_BRANCH so this patch will be removed with the upgrade
to KDE 3.0.3 (well, if it happens long enough before KDE 3.1).