fix nonetype bug in appliance generation
fix nonetype bug in appliance generation


Former-commit-id: 04fc61a3ec80190b8bcded85afb0d0b705f488e5
Former-commit-id: 3ae3b083aca193ad35b9c2ad64ee78a1085244fc
Former-commit-id: 4a374b78eb821a1a5a215d318fcc96688b5304cc
dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy