Support @as_ptr in demarshaller to avoid copying data unnecessary
Support @as_ptr in demarshaller to avoid copying data unnecessary

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