fixed a thread state error

fixed an error freeing memory that was never allocated


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@8549 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/src/controls2.i

@@ -410,7 +410,9 @@ public:
     }
 
     void SetData(PyObject* obj) {
+        bool doSave = wxPyRestoreThread();
         Py_DECREF(m_obj);
+        wxPySaveThread(doSave);
         m_obj = obj;
         Py_INCREF(obj);
     }