lv_obj_user_data_ptr initial commit. Also deleted an unused variable in lv_indev to prevent compiler warnings

src/lv_core/lv_indev.c

@@ -513,7 +513,6 @@ static void indev_encoder_proc(lv_indev_t * i, lv_indev_data_t * data)
     /* Save the last keys before anything else.
      * They need to be already saved if the the function returns for any reason*/
     lv_indev_state_t last_state = i->proc.types.keypad.last_state;
-    uint32_t last_key = i->proc.types.keypad.last_key;
     i->proc.types.keypad.last_state = data->state;
     i->proc.types.keypad.last_key   = data->key;
 

src/lv_core/lv_obj.c

@@ -1970,15 +1970,25 @@ void lv_obj_get_type(lv_obj_t * obj, lv_obj_type_t * buf)
 #if LV_USE_USER_DATA_SINGLE
 
 /**
- * Get a pointer to the object's user data
+ * Get the object's user data
  * @param obj pointer to an object
- * @return pointer to the user data
+ * @return user data
  */
 lv_obj_user_data_t lv_obj_get_user_data(lv_obj_t * obj)
 {
     return obj->user_data;
 }
 
+/**
+ * Get a pointer to the object's user data
+ * @param obj pointer to an object
+ * @return pointer to the user data
+ */
+lv_obj_user_data_t *lv_obj_get_user_data_ptr(lv_obj_t * obj)
+{
+    return &obj->user_data;
+}
+
 /**
  * Set the object's user data. The data will be copied.
  * @param obj pointer to an object

src/lv_core/lv_obj.h

@@ -908,12 +908,19 @@ void * lv_obj_get_ext_attr(const lv_obj_t * obj);
 void lv_obj_get_type(lv_obj_t * obj, lv_obj_type_t * buf);
 
 #if LV_USE_USER_DATA_SINGLE
+/**
+ * Get the object's user data
+ * @param obj pointer to an object
+ * @return user data
+ */
+lv_obj_user_data_t lv_obj_get_user_data(lv_obj_t * obj);
+
 /**
  * Get a pointer to the object's user data
  * @param obj pointer to an object
  * @return pointer to the user data
  */
-lv_obj_user_data_t lv_obj_get_user_data(lv_obj_t * obj);
+lv_obj_user_data_t *lv_obj_get_user_data_ptr(lv_obj_t * obj);
 
 /**
  * Set the object's user data. The data will be copied.