Bug#770840: ark: Ark crashes on exit when nested archives opened

[Tsu Jan <tsujan2000@gmail.com>]

I confirm the existence of the bug and also that this commit fixes it:

http://quickgit.kde.org/?p=ark.git&a=commit&h=9c30f30b38c36a31e6fcb3aa047a0247ac5a22fb