Fixed an issue where an entity could fail to spawn, and this would end the edit

worldedit-core/src/main/java/com/sk89q/worldedit/extent/ChangeSetExtent.java

@@ -68,7 +68,7 @@ public class ChangeSetExtent extends AbstractDelegateExtent {
     @Override
     public Entity createEntity(Location location, BaseEntity state) {
         Entity entity = super.createEntity(location, state);
-        if (state != null) {
+        if (entity != null) {
             changeSet.add(new EntityCreate(location, state, entity));
         }
         return entity;