修改 event_ptr 空指针bug

event.cpp

@@ -125,7 +125,7 @@ void Event::handle_alarm_event(EVENT_TYPE et,uint64_t id,double limit_value,doub
             event_ptr->m_cur_time = std::chrono::system_clock::now();
             event_ptr->m_status = ES_END;
             event_ptr->m_cur_value = cur_value;
-            ev_ptr->m_desc=desc;
+            event_ptr->m_desc=desc;
             event_ptr->m_is_sent=false;
             ev_ptr=event_ptr;
         }