sync ordering of stddef.h includes with expat 2.1.1
diff --git a/Modules/expat/xmlrole.c b/Modules/expat/xmlrole.c
index 9a8f85d..44772e2 100644
--- a/Modules/expat/xmlrole.c
+++ b/Modules/expat/xmlrole.c
@@ -2,6 +2,8 @@
    See the file COPYING for copying permission.
 */
 
+#include <stddef.h>
+
 #ifdef COMPILED_FROM_DSP
 #include "winconfig.h"
 #elif defined(MACOS_CLASSIC)
@@ -16,8 +18,6 @@
 #endif
 #endif /* ndef COMPILED_FROM_DSP */
 
-#include <stddef.h>
-
 #include "expat_external.h"
 #include "internal.h"
 #include "xmlrole.h"
diff --git a/Modules/expat/xmltok.c b/Modules/expat/xmltok.c
index 205c07e..bf09dfc 100644
--- a/Modules/expat/xmltok.c
+++ b/Modules/expat/xmltok.c
@@ -2,6 +2,8 @@
    See the file COPYING for copying permission.
 */
 
+#include <stddef.h>
+
 #ifdef COMPILED_FROM_DSP
 #include "winconfig.h"
 #elif defined(MACOS_CLASSIC)
@@ -16,8 +18,6 @@
 #endif
 #endif /* ndef COMPILED_FROM_DSP */
 
-#include <stddef.h>
-
 #include "expat_external.h"
 #include "internal.h"
 #include "xmltok.h"