pass wxIntPtr, not wxUIntPtr, to wxListCtrl::SortItems() callback as it's more compatible with the existing code assuming that this parameter is signed (as our own wxFileCtrl did)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60198 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/listctrl.h

@@ -138,7 +138,7 @@ public:
     long InsertColumn( long col, const wxString& heading,
                        int format = wxLIST_FORMAT_LEFT, int width = -1 );
     bool ScrollList( int dx, int dy );
-    bool SortItems( wxListCtrlCompare fn, wxUIntPtr data );
+    bool SortItems( wxListCtrlCompare fn, wxIntPtr data );
     bool Update( long item );
     // Must provide overload to avoid hiding it (and warnings about it)
     virtual void Update() { wxControl::Update(); }