Description of problem:
If default entry in grub.conf is not specified, pygrub bombs out with a error
message.

Version-Release number of selected component (if applicable):
xen-3.0.2-0.FC5.1
PYGRUB_VER = 0.3


How reproducible:
always

Steps to Reproduce:
1. remove or comment out the default line in grub.conf in a xen-guest
2.
3.
  
Actual results:
# xm create xen04
Using config file "/etc/xen/xen04".
Traceback (most recent call last):
  File "/usr/bin/pygrub", line 260, in ?
    sel = cf.default
  File "/usr/lib/python2.4/site-packages/grub/GrubConf.py", line 193, in
_get_default
    return self._default
AttributeError: 'GrubConfigFile' object has no attribute '_default'
Error: Boot loader didn't return any data!


Expected results:
pygrub should go to interactive mode, or let me select the entry to boot with
the --entry parameter.


Additional info: