patch from Vladimir (move Py_Mem* interface to Include/pymem.h)
diff --git a/Include/objimpl.h b/Include/objimpl.h
index 3c0c7fc..0fd813d 100644
--- a/Include/objimpl.h
+++ b/Include/objimpl.h
@@ -10,12 +10,13 @@
 
 #ifndef Py_OBJIMPL_H
 #define Py_OBJIMPL_H
+
+#include "pymem.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#include "pyport.h"
-
 /*
 Functions and macros for modules that implement new object types.
 You must first include "object.h".