Line-up interfaces to use size_t for GetCount()s (and count related api).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38076 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/palmos/listbox.h

@@ -81,7 +81,7 @@ public:
     virtual void Clear();
     virtual void Delete(int n);
 
-    virtual int GetCount() const;
+    virtual size_t GetCount() const;
     virtual wxString GetString(int n) const;
     virtual void SetString(int n, const wxString& s);
 
@@ -141,7 +141,6 @@ protected:
     // free memory (common part of Clear() and dtor)
     void Free();
 
-    int m_noItems;
     int m_selected;
 
     virtual wxSize DoGetBestSize() const;