Merge pull request #693 from joltwallet/dirty_heap

Don't dirty heap if the lv_btn action deletes the button obj

lv_objx/lv_btn.c

@@ -684,7 +684,9 @@ 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);
                 }
             }
-            ext->long_pr_action_executed  = 0;
+            if(res != LV_RES_INV) {
+                ext->long_pr_action_executed  = 0;
+            }
         }
     } else if(sign == LV_SIGNAL_CLEANUP) {
 #if USE_LV_ANIMATION && LV_BTN_INK_EFFECT