use int instead of size_t for a couple member variables

it's simpler, and there is no point in using size_t anyway since they are assigned from ints

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69815 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/region.h

@@ -122,13 +122,11 @@ private:
     void Init();
     void CreateRects( const wxRegion& r );
 
-    size_t   m_current;
     wxRegion m_region;
-
     wxRect *m_rects;
-    size_t  m_numRects;
+    int m_numRects;
+    int m_current;
 
-private:
     DECLARE_DYNAMIC_CLASS(wxRegionIterator)
 };