Description of problem:
The graphical screen configuration reports an pyton error when its
tried to configure a Matrox G550 for dual head. On the console it
reports: 
---
Traceback (most recent call last):
  File "/usr/share/system-config-display/xConfigDialog.py", line 208,
in ok
    primaryPCIBus = "PCI:%d:%d:%d" % (self.state.get_videocard_PCIBus(),
TypeError: int argument required
---
When after configuration the file should been saved.

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


How reproducible:


Steps to Reproduce:
1. Use a Matrox G550 Card on a x86 Computer
2. Install Fedora
3. Plug a second Monitor
4. Try to configure the card for the second monitor using the
system-config-display tool from the bash call. 
5. Look at the output of the program
  
Actual results:
aceback (most recent call last):
  File "/usr/share/system-config-display/xConfigDialog.py", line 208,
in ok
    primaryPCIBus = "PCI:%d:%d:%d" % (self.state.get_videocard_PCIBus(),
TypeError: int argument required


Expected results:
Saving the configuration and exit


Additional info:
Can be relational to an other bug which wrongly configures the matrox
cards regarding to the device section and pci address for the second
screen