Don't dirty heap if the action deletes the button

lv_objx/lv_btn.c

@@ -684,8 +684,10 @@ static lv_res_t lv_btn_signal(lv_obj_t * btn, lv_signal_t sign, void * param)
                     res = ext->actions[LV_BTN_ACTION_CLICK](btn);
                 }
             }
+            if( LV_RES_INV != res ) {
                 ext->long_pr_action_executed  = 0;
             }
+        }
     } else if(sign == LV_SIGNAL_CLEANUP) {
 #if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
         if(btn == ink_obj) {