Double-clicking plugin list causes error message

[Johannes Sasongko]

Edit → Preferences → Plugins, double-click any row in the treeview.

Traceback (most recent call last):
  File "C:\exaile\xl\plugins.py", line 122, in enable_plugin
    plugin = self.load_plugin(pluginname)
  File "C:\exaile\xl\plugins.py", line 80, in load_plugin
    path = self.__findplugin(pluginname)
  File "C:\exaile\xl\plugins.py", line 71, in __findplugin
    path = os.path.join(dir, pluginname)
  File "C:\Python27\lib\ntpath.py", line 73, in join
    elif isabs(b):
  File "C:\Python27\lib\ntpath.py", line 57, in isabs
    s = splitdrive(s)[1]
  File "C:\Python27\lib\ntpath.py", line 125, in splitdrive
    if p[1:2] == ':':
TypeError: 'NoneType' object has no attribute '__getitem__'
WARNING : Unable to enable plugin None

Tested in Windows.

[Dustin Spicuzza (dustin-virtualroadside)]

GTK treeviews are a bit odd sometimes. Fixed in trunk @ r4400, 3.3.x @ r4329