Description of problem:
system-config-display crash when starting from existing xorg.conf

Version-Release number of selected component (if applicable):


How reproducible:
systematic

Steps to Reproduce:
1. have an xorg.conf that looks like:
Section "Device"
	Identifier "Videocard0"
	Driver "vesa"
EndSection

2. start system-config-display
  
Actual results:
$ system-config-display
Traceback (most recent call last):
  File "/usr/share/system-config-display/xconf.py", line 312, in <module>
    hardware_state = XF86HardwareState(xconfig)
  File "/usr/lib/python2.5/site-packages/rhpxl/xhwstate.py", line 174, in __init__
    self.init_from_xconfig(xconfig)
  File "/usr/lib/python2.5/site-packages/rhpxl/xhwstate.py", line 260, in init_from_xconfig
    if screen.device:
AttributeError: 'NoneType' object has no attribute 'device'
$ 


Expected results:
a window should start

Additional info:
adding the option --reconfig bypasses the problem