ClassIDs are now actually typeinfo name pointers.

I'll see, next, about the `instanceOf` thing, and going with
more normal RTTI routes.

dw/listitem.hh

@@ -13,7 +13,7 @@ protected:
    void setMaxValue (int maxValue, int value);
 
 public:
-   static int CLASS_ID;
+   static std::intptr_t CLASS_ID;
 
    ListItem(ListItem *ref, bool limitTextWidth);
    ~ListItem();