Fix crash on node view

In deallocated node state it is sometimes not possible
to view the node details anymore. Fixes
https://bugzilla.novell.com/show_bug.cgi?id=889834

(cherry picked from commit e1c3d040b53cb6069f837d2f80bb250352e05009)
Hrm, when is `proposal` defined if we're not entering this code path?