Apply suggestions from code review

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

Author: JelleZijlstra

Python/codegen.c

@@ -737,7 +737,7 @@ static int
 codegen_deferred_annotations_body(compiler *c, location loc,
     PyObject *deferred_anno, PyObject *conditional_annotation_indices, int scope_type)
 {
-    Py_ssize_t annotations_len = PyList_Size(deferred_anno);
+    Py_ssize_t annotations_len = PyList_GET_SIZE(deferred_anno);
 
     assert(PyList_CheckExact(conditional_annotation_indices));
     assert(annotations_len == PyList_Size(conditional_annotation_indices));
@@ -756,7 +756,7 @@ codegen_deferred_annotations_body(compiler *c, location loc,
         }
         PyObject *cond_index = PyList_GET_ITEM(conditional_annotation_indices, i);
         assert(PyLong_CheckExact(cond_index));
-        long idx = PyLong_AsLong(cond_index);
+        long idx = PyLong_AS_LONG(cond_index);
         NEW_JUMP_TARGET_LABEL(c, not_set);
 
         if (idx != -1) {

Python/compile.c

@@ -1163,11 +1163,9 @@ _PyCompile_AddDeferredAnnotation(compiler *c, stmt_ty s,
             return ERROR;
         }
     }
-    if (PyList_Append(c->u->u_conditional_annotation_indices, index) < 0) {
-        Py_DECREF(index);
-        return ERROR;
-    }
+    int rc = PyList_Append(c->u->u_conditional_annotation_indices, index);
     Py_DECREF(index);
+    RETURN_IF_ERROR(rc);
     return SUCCESS;
 }