Ettercap/ettercap — pull request #273 by koeppea (2013-07-12 23:30:12+00:00)
Title: Fix for issue #271

When a target has been selected, the targets will be scanned separately.
This will try to destroy the progress bar after the subnet scan but the progress bar has been destroyed already.

Just a quick check if the progress bar still exsits gets rid of the assertion.