DialogEd compiles and works more or less

wxList::Nth() is allowd to just return NULL for
    out-of-bounds index


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1177 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/list.cpp

@@ -289,9 +289,9 @@ wxNodeBase *wxListBase::Item(size_t n) const
         }
     }
 
-    wxFAIL_MSG( "invalid index in wxListBase::Item" );
+//    wxFAIL_MSG( "invalid index in wxListBase::Item" );
 
-    return NULL;
+    return (wxNodeBase *)NULL;
 }
 
 wxNodeBase *wxListBase::Find(const wxListKey& key) const