Use __Pyx_SET_SIZE() and __Pyx_SET_REFCNT()

Don't access directly PyObject.ob_refcnt and PyVarObject.ob_size.

Cython/Utility/Coroutine.c

@@ -1191,7 +1191,7 @@ static void __Pyx_Coroutine_del(PyObject *self) {
 #if !CYTHON_USE_TP_FINALIZE
     // Temporarily resurrect the object.
     assert(self->ob_refcnt == 0);
-    self->ob_refcnt = 1;
+    __Pyx_SET_REFCNT(self, 1);
 #endif
 
     __Pyx_PyThreadState_assign
@@ -1283,7 +1283,7 @@ static void __Pyx_Coroutine_del(PyObject *self) {
     {
         Py_ssize_t refcnt = self->ob_refcnt;
         _Py_NewReference(self);
-        self->ob_refcnt = refcnt;
+        __Pyx_SET_REFCNT(self, refcnt);
     }
 #if CYTHON_COMPILING_IN_CPYTHON
     assert(PyType_IS_GC(self->ob_type) &&

Cython/Utility/arrayarray.h

@@ -88,7 +88,7 @@ static CYTHON_INLINE PyObject * newarrayobject(PyTypeObject *type, Py_ssize_t si
     op->ob_descr = descr;
     op->allocated = size;
     op->weakreflist = NULL;
-    op->ob_size = size;
+    __Pyx_SET_SIZE(op, size);
     if (size <= 0) {
         op->data.ob_item = NULL;
     }
@@ -116,7 +116,7 @@ static CYTHON_INLINE int resize(arrayobject *self, Py_ssize_t n) {
         return -1;
     }
     self->data.ob_item = (char*) items;
-    self->ob_size = n;
+    __Pyx_SET_SIZE(self, n);
     self->allocated = n;
     return 0;
 }
@@ -126,7 +126,7 @@ static CYTHON_INLINE int resize_smart(arrayobject *self, Py_ssize_t n) {
     void *items = (void*) self->data.ob_item;
     Py_ssize_t newsize;
     if (n < self->allocated && n*4 > self->allocated) {
-        self->ob_size = n;
+        __Pyx_SET_SIZE(self, n);
         return 0;
     }
     newsize = n + (n / 2) + 1;
@@ -140,7 +140,7 @@ static CYTHON_INLINE int resize_smart(arrayobject *self, Py_ssize_t n) {
         return -1;
     }
     self->data.ob_item = (char*) items;
-    self->ob_size = n;
+    __Pyx_SET_SIZE(self, n);
     self->allocated = newsize;
     return 0;
 }