bugfixes

lv_obj/lv_indev.h

@@ -66,13 +66,14 @@ void lv_indev_enable(lv_hal_indev_type_t type, bool enable);
  */
 void lv_indev_set_cursor(lv_indev_t *indev, lv_obj_t *cur_obj);
 
+#if LV_OBJ_GROUP
 /**
  * Set a destination group for a keypad input device
  * @param indev pointer to an input device (type: 'LV_INDEV_TYPE_KEYPAD')
  * @param group point to a group
  */
 void lv_indev_set_group(lv_indev_t *indev, lv_group_t *group);
-
+#endif
 /**
  * Get the last point of an input device
  * @param indev pointer to an input device