gmixer crashes when ~/.Xauthority is missing

[Christoph Wickert]

gmixer crashes on startup when ~/.Xauthority is missing:

backtrace
-----
Summary: TBbe67add7 xauth.py:46:__init__:XauthError: ~/.Xauthority: [Errno 2]
No such file or directory: '/home/chris/.Xauthority'

Traceback (most recent call last):
  File "/usr/lib64/python2.6/site-packages/gtktrayicon.py", line 114, in
on_realize
    xdisplay = self.get_xdisplay()
  File "/usr/lib64/python2.6/site-packages/gtktrayicon.py", line 161, in
get_xdisplay
    xdisplay = Xdisplay.Display(name)
  File "/usr/lib/python2.6/site-packages/Xlib/display.py", line 85, in __init__
    self.display = _BaseDisplay(display)
  File "/usr/lib/python2.6/site-packages/Xlib/display.py", line 67, in __init__
    apply(protocol.display.Display.__init__, (self, ) + args, keys)
  File "/usr/lib/python2.6/site-packages/Xlib/protocol/display.py", line 53, in
__init__
    name, host, displayno)
  File "/usr/lib/python2.6/site-packages/Xlib/support/connect.py", line 96, in
get_auth
    return mod.get_auth(sock, dname, host, dno)
  File "/usr/lib/python2.6/site-packages/Xlib/support/unix_connect.py", line
100, in new_get_auth
    au = xauth.Xauthority()
  File "/usr/lib/python2.6/site-packages/Xlib/xauth.py", line 46, in __init__
    raise error.XauthError('~/.Xauthority: %s' % err)
XauthError: ~/.Xauthority: [Errno 2] No such file or directory:
'/home/chris/.Xauthority'

Local variables in innermost frame:
self: <Xlib.xauth.Xauthority instance at 0x2be8170>
err: [Errno 2] No such file or directory: '/home/chris/.Xauthority'
filename: /home/chris/.Xauthority

Of course there should always be an .Xauthority file, but gmixer shouldn't crash if it is not available