VNC connection using the vncserver script included in xorg-x11-Xvnc works only
when dbus-1-x11 is installed. Otherwise the vnc client shows only a black
screen.

Steps to reproduce:

1. Make a minimal installation of OpenSUSE. In the installer, select the
following components:

patterns: only "X Window system"
additional packages: xorg-x11-essentials, xorg-x11-Xvnc, icewm
recommended packages: off

Make sure that dbus-1-x11 isn't installed.

2. Start the system, open xterm, run "vncserver". Try to connect via VNC
client.
-> connection is possible, but only a black screen shows up.

3. Stop vncserver (run "vncserver -kill :1"). Install "dbus-1-x11".

4. Start vncserver, connect again via VNC client:
-> works