fixed an issue that rarely caused kwm to segfault when trying to tile a new window
fixed an issue that rarely caused kwm to segfault when trying to tile a new window

cHoco/kwm,koekeishiya/kwm,akdor1154/kwm,akdor1154/kwm,a-morales/kwm,akdor1154/kwm,koekeishiya/kwm,cHoco/kwm,a-morales/kwm,koekeishiya/kwm,cHoco/kwm,a-morales/kwm