ports/169565: [patch] emulators/virtualbox-ose-kmod vboxnetadp kernel panic on unload

[Bernhard Fröhlich]

The fix looks obvious and good to me but could you please also attach
a stacktrace from the panic? We will need it to send the fix upstream.
And please also reply if it is okay for you that the fix is send
upstream under the MIT License. (keep freebsd-ports-bugs@ cc'd please)

--
Bernhard Fröhlich
http://www.bluelife.at/