bugfix: use 'unsigned long' to feed XChangeProperty, closes #3285968
bugfix: use 'unsigned long' to feed XChangeProperty, closes #3285968

old code crashed on sparc64, pid_t seems to be 32bit on that platform.

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