This is required to be able to do proper event loop integration with Qt.
Idea was taken from vino's libvncserver fork.

git-svn-id: svn://anonsvn.kde.org/home/kde/trunk/KDE/kdenetwork/krfb/libvncserver@1195286 283d02a7-25f6-0310-bc7c-ecb5cbfe19da