Fixed bug #1362913, did not check format pointer.
Fixed bug #1362913, did not check format pointer.

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