Changes needed for building with Python 2.5

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39987 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/src/_bitmap.i

@@ -150,8 +150,8 @@ bit depths, the behaviour is platform dependent.", "");
         
         %RenameCtor(BitmapFromBits, wxBitmap(PyObject* bits, int width, int height, int depth=1 ))
         {
-            char* buf;
-            int   length;
+            char*      buf;
+            Py_ssize_t length;
             PyString_AsStringAndSize(bits, &buf, &length);
             return new wxBitmap(buf, width, height, depth);
         }