From 8b3907ae811554608fe17581a04f66faa80f9519 Mon Sep 17 00:00:00 2001
From: Daniel Frey <d.frey@gmx.de>
Date: Wed, 23 Apr 2008 19:32:44 +0000
Subject: [PATCH] Remove dynamic_cast in init_internal_shared_once()

[SVN r44744]
---
 include/boost/enable_shared_from_this.hpp | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/boost/enable_shared_from_this.hpp b/include/boost/enable_shared_from_this.hpp
index 66f43f8..bac9764 100644
--- a/include/boost/enable_shared_from_this.hpp
+++ b/include/boost/enable_shared_from_this.hpp
@@ -23,14 +23,11 @@ namespace boost
 
 template<class T> class enable_shared_from_this
 {
-// dynamic cast to template type doesn't work in constructor, so we have
-// to use lazy initialization
     void init_internal_shared_once() const
     {
         if( !owned() && _internal_shared_count.empty() )
         {
-            T * p = dynamic_cast<T *>(const_cast<enable_shared_from_this*>(this));
-            detail::shared_count( p, detail::sp_deleter_wrapper() ).swap(_internal_shared_count);
+            detail::shared_count( (void*)0, detail::sp_deleter_wrapper() ).swap(_internal_shared_count);
             _internal_weak_count = _internal_shared_count;
         }
     }