fix program crashes caused by unshading
fix program crashes caused by unshading

lukoko/fluxbox,Arkq/fluxbox,naimdjon/fluxbox,naimdjon/fluxbox,naimdjon/fluxbox,naimdjon/fluxbox,olivergondza/fluxbox,olivergondza/fluxbox,Arkq/fluxbox,luebking/fluxbox,luebking/fluxbox,olivergondza/fluxbox,lukoko/fluxbox,lukoko/fluxbox,luebking/fluxbox,naimdjon/fluxbox,lukoko/fluxbox,Arkq/fluxbox,luebking/fluxbox,Arkq/fluxbox,lukoko/fluxbox,olivergondza/fluxbox,olivergondza/fluxbox,Arkq/fluxbox,luebking/fluxbox