channel-introspect test: try examining a channel that doesn't actually exist
channel-introspect test: try examining a channel that doesn't actually exist

This provides a basic test for the GetInterfaces() (etc.) failure path.

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib