Comment 0 for bug 755608

Using Archlinux and KDE 4.6.2, ntrack 013.
pptp vpn on and off will cause kded4 using 100% cpu, and backtrace shows that it get deadloop in get_nl_link_by_index. Seems the scan on cycle linked list in get_nl_link_by_index will never get to end if there is not break satisfies. I don't know whether it is ntrack bug or KDE's bug.

at least patch this function to get the loop end properly after a cycle fix this bug for me.

Related bug report: https://bugs.kde.org/show_bug.cgi?id=268038