Make DrawableHitObject's UpdateState safer by blocking calls at a higher level with not yet loaded.

UpdateState is called in LoadComplete for cases where the state may have changed before a load operation.

osu.Game.Modes.Osu/Objects/Drawables/DrawableSlider.cs

@@ -158,8 +158,6 @@ namespace osu.Game.Modes.Osu.Objects.Drawables
 
         protected override void UpdateState(ArmedState state)
         {
-            if (!IsLoaded) return;
-
             base.UpdateState(state);
 
             ball.FadeIn();