Fix for Fix: Occluder Instance Entity Index Out of Range

`occluder_instance` is now properly assigned.

Changed check to `entity_index in entity_occluder_instances` due to it being a Dictionary and not an Array.

Occluder instances no longer indexing out of range on map build.

addons/qodot/src/nodes/qodot_map.gd

@@ -1063,8 +1063,8 @@ func apply_entity_occluders() -> void:
 		var mesh := entity_mesh_dict[entity_idx] as Mesh
 		var occluder_instance : OccluderInstance3D
 
-		if entity_occluder_instances.size() > entity_idx:
-			entity_occluder_instances[entity_idx]
+		if entity_idx in entity_occluder_instances:
+			occluder_instance = entity_occluder_instances[entity_idx]
 
 		if not mesh or not occluder_instance:
 			continue