Fixes Issue 14234: fix for the previous commit, keep compilation when
using --with-system-expat working when the system expat does not have
salted hash support.
diff --git a/Modules/pyexpat.c b/Modules/pyexpat.c
index c1142de..bf81e2a 100644
--- a/Modules/pyexpat.c
+++ b/Modules/pyexpat.c
@@ -1150,8 +1150,13 @@
     else {
         self->itself = XML_ParserCreate(encoding);
     }
+#if ((XML_MAJOR_VERSION >= 2) && (XML_MINOR_VERSION >= 1)) || defined(XML_HAS_SET_HASH_SALT)
+    /* This feature was added upstream in libexpat 2.1.0.  Our expat copy
+     * has a backport of this feature where we also define XML_HAS_SET_HASH_SALT
+     * to indicate that we can still use it. */
     XML_SetHashSalt(self->itself,
                     (unsigned long)_Py_HashSecret.prefix);
+#endif
     self->intern = intern;
     Py_XINCREF(self->intern);
     PyObject_GC_Track(self);