Fix RArmorStand initialization race condition

SpigotCore_Main/src/de/steamwar/entity/RArmorStand.java

@@ -59,6 +59,8 @@ public class RArmorStand extends REntity {
     @Override
     void spawn(Consumer<Object> packetSink) {
         super.spawn(packetSink);
+
+        if(size != null && size != Size.NORMAL)
             packetSink.accept(getDataWatcherPacket(sizeWatcher, size.value));
     }