added string-pooling for shader variable names and entity keys

git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/trunk@26 8a3a26a2-13c4-0310-b231-cf6edde360e5

plugins/mapq3/plugin.cpp

@@ -500,11 +500,11 @@ public:
   typedef Value* const_iterator;
   const_iterator begin() const
   {
-    return m_children.begin;
+    return m_children.first;
   }
   const_iterator end() const
   {
-    return m_children.end;
+    return m_children.last;
   }
 };