use lock result instead of checking expired (#10)

* use lock result instead of checking expired

* v2.0.1

* fix intellisense mistake

Author: TheLartians

CMakeLists.txt

@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
 # ---- Project ----
 
 project(LarsEvent 
-  VERSION 2.0
+  VERSION 2.0.1
   LANGUAGES CXX
 )
 

README.md

@@ -36,7 +36,7 @@ With [CPM](https://github.com/TheLartians/CPM), lars::Event can be added to your
 ```cmake
 CPMAddPackage(
   NAME LarsEvent
-  VERSION 2.0
+  VERSION 2.0.1
   GIT_REPOSITORY https://github.com/TheLartians/Event.git
 )
 

include/lars/event.h

@@ -90,8 +90,8 @@ namespace lars{
       }
 
       void reset(){
-        if(!parent.expired()){ 
-          (*parent.lock())->eraseHandler(id); 
+        if(auto p = parent.lock()){ 
+          (*p)->eraseHandler(id); 
         }
         parent.reset();
       }