Add lv_anim_user_data_t
May be related to: Commit - [add user data where is was missing](https://github.com/littlevgl/lvgl/commit/e2cfba7c9f7b92130601a71a2421934ce2d69538)
/*1: Enable the Animations */
#define LV_USE_ANIMATION 1
+#if LV_USE_ANIMATION
+typedef void * lv_anim_user_data_t;
+#endif
/* 1: Enable shadow drawing*/
#define LV_USE_SHADOW 1
