Revert non-cosmetic change from previous checkin

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12623 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Lib/python/builtin.swg

@@ -188,10 +188,6 @@ wrapper##_closure(PyObject *a) {		\
     return result;				\
 }
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 SWIGINTERN int
 SwigPyBuiltin_BadInit(PyObject *self, PyObject *SWIGUNUSEDPARM(args), PyObject *SWIGUNUSEDPARM(kwds)) {
   PyErr_Format(PyExc_TypeError, "Cannot create new instances of type '%.300s'", self->ob_type->tp_name);
@@ -476,6 +472,3 @@ SwigPyBuiltin_SetMetaType (PyTypeObject *type, PyTypeObject *metatype)
 #endif
 }
 
-#ifdef __cplusplus
-}
-#endif