fix: fixed Xbox 360 build issues

Minecraft.Client/EnderDragonRenderer.h

@@ -6,8 +6,12 @@ class EnderDragon;
 #endif
 class DragonModel;
 
+class EnderDragon;
 class EnderDragonRenderer : public MobRenderer
 {
+public:
+	static shared_ptr<EnderDragon> bossInstance;
+
 private:
 	static ResourceLocation DRAGON_EXPLODING_LOCATION;
 	static ResourceLocation CRYSTAL_BEAM_LOCATION;