Bug #1432350: arrayobject should use PyObject_VAR_HEAD

Doc/api/newtypes.tex

@@ -188,7 +188,7 @@ These macros are used in the definition of \ctype{PyObject} and
   instance.  This macro always expands to:
   \begin{verbatim}
     PyObject_HEAD
-    int ob_size;
+    Py_ssize_t ob_size;
   \end{verbatim}
   Note that \csimplemacro{PyObject_HEAD} is part of the expansion, and
   that its own expansion varies depending on the definition of

Modules/arraymodule.c

@@ -29,8 +29,7 @@ struct arraydescr {
 };
 
 typedef struct arrayobject {
-	PyObject_HEAD
-	Py_ssize_t ob_size;
+	PyObject_VAR_HEAD
 	char *ob_item;
 	Py_ssize_t allocated;
 	struct arraydescr *ob_descr;