server: add missing ifdef USE_OGL (red_worker.c)
server: add missing ifdef USE_OGL (red_worker.c)

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