fix(TU20): Fixed a crash when a dispenser is dispensing water or lava when the dispenser is blocked.

Minecraft.World/ItemDispenseBehaviors.h

@@ -83,7 +83,11 @@ private:
 class FilledBucketDispenseBehavior : public DefaultDispenseItemBehavior
 {
 public:
+    FilledBucketDispenseBehavior();
+
 	virtual shared_ptr<ItemInstance> execute(BlockSource *source, shared_ptr<ItemInstance> dispensed, eOUTCOME &outcome);
+private:
+    DefaultDispenseItemBehavior* dispenseBehavior;
 };
 
 class EmptyBucketDispenseBehavior : public DefaultDispenseItemBehavior