Description of problem:
system-config-display terminates at startup if XF86Config contains 
manually crafted ModeLines which have "uncommon" names, such as 
"1024x768@85", accepting only lines of the sort "1024x768".

Version-Release number of selected component (if applicable):
1.0.8-1

How reproducible:
always

Steps to Reproduce:
1. manually add such a ModeLine to /etc/X11/XF86Config:
ModeLine "1600x1000@91" 215.50 1600 1688 2104 2264 1000 1003 1016 
1046 #91Hz
2. call system-config-display
3.
  
Actual results:
(system-config-display:10492): Gtk-WARNING **: GModule initialization 
check failed: Gtk+ version too old (micro mismatch)
* ddcprobe returned bogus values:
ID:   SNY00ea
Name: SNY00ea
HorizSync: None
VertSync:  None
 
Traceback (most recent call last):
  File "/usr/share/system-config-display/xconf.py", line 348, in ?
    hardware_state = XF86HardwareState(xconfig)
  File "/usr/lib/python2.3/site-packages/rhpl/xhwstate.py", line 146, 
in __init__
    self.init_from_xconfig(xconfig)
  File "/usr/lib/python2.3/site-packages/rhpl/xhwstate.py", line 275, 
in init_from_xconfig
    self.all_resolutions.sort (compare_resolution)
  File "/usr/lib/python2.3/site-packages/rhpl/xhwstate.py", line 50, 
in compare_resolution
    a1 = resolution_area(res1)
  File "/usr/lib/python2.3/site-packages/rhpl/xhwstate.py", line 46, 
in resolution_area
    (w, h) = resolution_from_string(res)
  File "/usr/lib/python2.3/site-packages/rhpl/xhwstate.py", line 43, 
in resolution_from_string
    return (string.atoi(w), string.atoi(h))
  File "/usr/lib/python2.3/string.py", line 220, in atoi
    return _int(s, base)
ValueError: invalid literal for int(): 1000@91

Expected results:
Program UI starts.

Additional info:
(Dunno why ddcprobe fails, but that's not the reason.)
I need to craft ModeLines manually, because my 16/10 monitor a) 
reports stupid 4/3 lines, and b) I may want other resolutions or 
timings. I use programs such as "modeline" or online services, and 
all these use the syntax "1024x768@80" to differentiate the different 
vertical frequencies. s-c-d cannot parse this, and fails here 
("/usr/lib/python2.3/site-packages/rhpl/xhwstate.py", line 43):

def resolution_from_string(res):
    (w, h) = string.split (res, "x")
    return (string.atoi(w), string.atoi(h))

Any chance in making this possible?