Happy ghast saddle model doesn't change when lead is broken by exceeding max range.

When the happy ghast is attatched to a boat with a lead, the lead texture is added to the harness texture. If the boat gets trapped and gets pulled too far it breaks off, the happy ghast should lose the lead texture and only be left with the harness texture. Instead the ghast is left with the harness and lead texture still applied. Although upon dismounting the lead texture is removed and the error is solved.