client/windows: don't allocate console unless required
client/windows: don't allocate console unless required

Fantu/spice,fgouget/spice,dezelin/spice,Fantu/spice,SPICE/spice,ya-mouse/spice,alon/spice-server,elmarco/spice,freedesktop-unofficial-mirror/spice__spice,ya-mouse/spice,Fantu/spice,dezelin/spice,elmarco/spice,freedesktop-unofficial-mirror/spice__spice,mathslinux/spice,dezelin/spice,alon/spice-server,elmarco/spice,SPICE/spice,mathslinux/spice,freedesktop-unofficial-mirror/spice__spice,mathslinux/spice,dezelin/spice,freedesktop-unofficial-mirror/spice__spice,freedesktop-unofficial-mirror/spice__spice,elmarco/spice,dezelin/spice,alon/spice-server,mathslinux/spice,ya-mouse/spice,Fantu/spice,elmarco/spice,fgouget/spice,fgouget/spice,SPICE/spice,alon/spice-server,mathslinux/spice,fgouget/spice,alon/spice-server