Creating hardlink leads to an error if destination contains an umlaut

[Stephan Müller]

Distribution: Ubuntu 14.04 trusty
Application: Ubuntu Tweak 0.8.8-1~trusty1
Desktop:ubuntu

Traceback (most recent call last):
  File "/usr/share/ubuntu-tweak/script-worker", line 205, in __init__
    work(file, folder)
  File "/usr/share/ubuntu-tweak/script-worker", line 142, in hardlink
    cls.do_hard_link(source, dest)
  File "/usr/share/ubuntu-tweak/script-worker", line 94, in do_hard_link
    if cls.permission_test(dest):
  File "/usr/share/ubuntu-tweak/script-worker", line 57, in permission_test
    ErrorDialog(_("You don't have permission to write in %s") % dirname).launch()
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 34: ordinal not in range(128)