prevent crash if m_keylist is 0
prevent crash if m_keylist is 0

again, i do not know yet, why this could happen.

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