KeyError: 'USERNAME'

Version 0.6.2

Traceback (most recent call last):
  File "/usr/share/cgmail/cgmailservice.py", line 20, in <module>
    from cGmail.service.mainloop import MainLoop
  File "/usr/share/cgmail/cGmail/service/mainloop.py", line 33, in <module>
    if os.environ["USERNAME"] == "root":
  File "/usr/lib/python2.6/UserDict.py", line 22, in __getitem__
    raise KeyError(key)
KeyError: 'USERNAME'

The problem is that there is no "USERNAME" environmental variable set on my system (Debian Sid). This also just a bad way to check if the script is running as root, anyway. I would suggest replacing

    if os.environ["USERNAME"] == "root":

with

    if os.geteuid() == 0: