[winswitch] object has no attribute 'is_toplevel' (was XPRA_SOCKET_DIR=..)

[Antoine Martin]

>>    Traceback (most recent call last):
>>      File "/usr/lib/python2.6/site-packages/xpra/client_window.py", line
>>    210, in do_realize
>>        if self.is_toplevel():
>>    AttributeError: 'ClientWindow' object has no attribute 'is_toplevel'
Fix for old versions of PyGTK:
https://www.xpra.org/trac/changeset/1498
New beta package with latest fix:
https://www.xpra.org/beta/CentOS/6.3/i386/xpra-0.6.0-3.el6.i386.rpm

Tested OK on CentOS 6.3 x86.

Cheers
Antoine