address review: +use Py_BuildValue

Author: skirpichev

Modules/_testcapi/complex.c

@@ -102,22 +102,16 @@ _py_c_neg(PyObject *Py_UNUSED(module), PyObject *num)
     static PyObject *                                            \
     _py_c_##suffix(PyObject *Py_UNUSED(module), PyObject *args)  \
     {                                                            \
-        Py_complex num, exp;                                     \
+        Py_complex num, exp, res;                                \
         PyObject *res;                                           \
                                                                  \
         if (!PyArg_ParseTuple(args, "DD", &num, &exp)) {         \
             return NULL;                                         \
         }                                                        \
                                                                  \
         errno = 0;                                               \
-        num = _Py_c_##suffix(num, exp);                          \
-                                                                 \
-        res = PyComplex_FromCComplex(num);                       \
-        if (!res) {                                              \
-            return NULL;                                         \
-        }                                                        \
-                                                                 \
-        return Py_BuildValue("Ni", res, errno);                  \
+        res = _Py_c_##suffix(num, exp);                          \
+        return Py_BuildValue("Di", res, errno);                  \
     };
 
 _PY_C_FUNC2(sum)