fixes when some features are disabled

src/lv_objx/lv_tabview.c

@@ -691,6 +691,7 @@ static lv_res_t lv_tabview_signal(lv_obj_t * tabview, lv_signal_t sign, void * p
             tabview_realign(tabview);
         }
     } else if(sign == LV_SIGNAL_RELEASED) {
+#if LV_USE_GROUP
         /*If released by a KEYPAD or ENCODER then really the tab buttons should be released.
          * So simulate a CLICK on the tab buttons*/
         lv_indev_t * indev         = lv_indev_get_act();
@@ -699,6 +700,7 @@ static lv_res_t lv_tabview_signal(lv_obj_t * tabview, lv_signal_t sign, void * p
            (indev_type == LV_INDEV_TYPE_ENCODER && lv_group_get_editing(lv_obj_get_group(tabview)))) {
             lv_event_send(ext->btns, LV_EVENT_CLICKED, lv_event_get_data());
         }
+#endif
     } else if(sign == LV_SIGNAL_FOCUS || sign == LV_SIGNAL_DEFOCUS || sign == LV_SIGNAL_CONTROL) {
         /* The button matrix is not in a group (the tab view is in it) but it should handle the
          * group signals. So propagate the related signals to the button matrix manually*/