codegen: avoid creating out if not used (fix gcc 4.6.0 warning)
codegen: avoid creating out if not used (fix gcc 4.6.0 warning)

elmarco/spice-common,freedesktop-unofficial-mirror/spice__spice-common,Fantu/spice-common,freedesktop-unofficial-mirror/spice__spice-common,SPICE/spice-common,elmarco/spice-common,fgouget/spice-common,fgouget/spice-common,Fantu/spice-common,freedesktop-unofficial-mirror/spice__spice-common,Fantu/spice-common,SPICE/spice-common,elmarco/spice-common,fgouget/spice-common,SPICE/spice-common,Fantu/spice-common,elmarco/spice-common,freedesktop-unofficial-mirror/spice__spice-common,fgouget/spice-common