When we add the NetDevice pointer to the GPtrArray, we have
a single reference owned by the panel. When iterating over
this GPtrArray, no reference is taken.
The problem is that the code to handle command-line arguments
was unreferencing the NetDevices when iterating over it,
creating a disparity in the ref/unref pairs.
Fix that by simply not unreferencing the NetDevice instance
when iterating over it.
https://bugzilla.gnome.org/show_bug.cgi?id=786514
5a3b19ef33