Fixed registration of a class that is already registered.
Fixed registration of a class that is already registered.

kidaa/kryo,narahari92/kryo,magro/kryo,irudyak/kryo,hierynomus/kryo,EsotericSoftware/kryo,xfrendx/kryo,kidaa/kryo,doubleyoung/kryo,EsotericSoftware/kryo,EsotericSoftware/kryo,tomdkt/kryo,hepin1989/kryo,EsotericSoftware/kryo,tomdkt/kryo,childRon/kryo,irudyak/kryo,romix/kryo,hierynomus/kryo,magro/kryo,xfrendx/kryo,hepin1989/kryo,doubleyoung/kryo,mikee805/kryo,mikee805/kryo,childRon/kryo,narahari92/kryo