Fixed a interpreter lock problem in the __eq__ and __ne__ methods in wxSize and etc.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@19623 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/src/helpers.h

@@ -66,6 +66,8 @@ void           wxPyEndAllowThreads(PyThreadState* state);
 void wxPyBeginBlockThreads();
 void wxPyEndBlockThreads();
 
+#define wxPyBLOCK_THREADS(stmt) wxPyBeginBlockThreads(); stmt; wxPyEndBlockThreads()
+
 //----------------------------------------------------------------------
 // These are helpers used by the typemaps