Description of problem:
It seems that no matter what the path or input is, when adding a fifth share an
error occurs:

Traceback (most recent call last):
  File "/usr/share/system-config-samba/shareWindow.py", line 436, in
onOkButtonClicked
    token = self.samba_data.createToken("", last_section)
  File "/usr/share/system-config-samba/sambaParser.py", line 228, in createToken
    if line[-1] == '\n':
IndexError: string index out of range


Version-Release number of selected component (if applicable):
system-config-samba-1.2.47-1.fc8

How reproducible:
Always

Steps to Reproduce:
1. Add four shares
2. Try to add a fifth
3.
  
Actual results:
The traceback above is shown in the terminal and the new entry appears on the
gtk.Treeview, although the 'New' dialog does not close and upon restarting
system-config-samba, the new entry is nowhere to be found.

Expected results:
The entry adds itself to the configuration file

Additional info:
Running `testparm` shows that with the 4 sections it's a valid configuration file