added self-assignment check to wxListItem::operator=()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56745 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/include/wx/listbase.h b/include/wx/listbase.h
index 4fad38b7a44483405f20c32fc2449a561a826b45..d8738e86ec03e84d6b3e2e0b3977096c45819b46 100644 (file)
--- a/include/wx/listbase.h
+++ b/include/wx/listbase.h
@@ -238,17 +238,20 @@ public:
 
     wxListItem& operator=(const wxListItem& item)
     {
 
     wxListItem& operator=(const wxListItem& item)
     {

-        m_mask = item.m_mask;
-        m_itemId = item.m_itemId;
-        m_col = item.m_col;
-        m_state = item.m_state;
-        m_stateMask = item.m_stateMask;
-        m_text = item.m_text;
-        m_image = item.m_image;
-        m_data = item.m_data;
-        m_format = item.m_format;
-        m_width = item.m_width;
-        m_attr = item.m_attr ? new wxListItemAttr(*item.m_attr) : NULL;
+        if ( &item != this )
+        {
+            m_mask = item.m_mask;
+            m_itemId = item.m_itemId;
+            m_col = item.m_col;
+            m_state = item.m_state;
+            m_stateMask = item.m_stateMask;
+            m_text = item.m_text;
+            m_image = item.m_image;
+            m_data = item.m_data;
+            m_format = item.m_format;
+            m_width = item.m_width;
+            m_attr = item.m_attr ? new wxListItemAttr(*item.m_attr) : NULL;
+        }

 
         return *this;
     }
 
         return *this;
     }