#5 Useless config error & crash

[Gavin Jefferies]

A host in mistrust mode added to a system in trust mode
gives a useless 'error loading configuration: 0 message'

And crashes on config application

Can't use an undefined value as a HASH reference at
/usr/share/emptytree-seedy/lib/Gui/Page/Config.pm line
1105.
Attempt to free unreferenced scalar during global
destruction.