chore: add total_size

Author: fatelei

Modules/arraymodule.c

@@ -1600,15 +1600,16 @@ array_array_tofile_impl(arrayobject *self, PyTypeObject *cls, PyObject *f)
 
     Py_ssize_t offset = 0;
     while (1) {
-        if (self->ob_item == NULL || Py_SIZE(self) == 0) {
+        Py_ssize_t total_size = Py_SIZE(self);
+        if (self->ob_item == NULL || total_size == 0) {
             break;
         }
 
-        if (Py_SIZE(self) > max_items) {
+        if (total_size > max_items) {
             return PyErr_NoMemory();
         }
 
-        Py_ssize_t current_nbytes = Py_SIZE(self) * self->ob_descr->itemsize;
+        Py_ssize_t current_nbytes = total_size * self->ob_descr->itemsize;
         if (offset >= current_nbytes) {
             break;
         }