Add field to call to WantsToUseItem component

Author: Remimstr

book/src/chapter_10.md

@@ -167,7 +167,7 @@ RunState::ShowInventory => {
  newrunstate = RunState::ShowTargeting{ range: is_item_ranged.range, item: item_entity };
  } else {
  let mut intent = self.ecs.write_storage::<WantsToUseItem>();
- intent.insert(*self.ecs.fetch::<Entity>(), WantsToUseItem{ item: item_entity }).expect("Unable to insert intent");
+ intent.insert(*self.ecs.fetch::<Entity>(), WantsToUseItem{ item: item_entity, target: None }).expect("Unable to insert intent");
  newrunstate = RunState::PlayerTurn;
  }
  }