Use _PyObject_CallNoArg()

Replace:
    PyObject_CallFunctionObjArgs(callable, NULL)
with:
    _PyObject_CallNoArg(callable)
diff --git a/Modules/_asynciomodule.c b/Modules/_asynciomodule.c
index 67794c3..d8522b9 100644
--- a/Modules/_asynciomodule.c
+++ b/Modules/_asynciomodule.c
@@ -1948,7 +1948,7 @@
 
         if (!exc) {
             /* exc was not a CancelledError */
-            exc = PyObject_CallFunctionObjArgs(asyncio_CancelledError, NULL);
+            exc = _PyObject_CallNoArg(asyncio_CancelledError);
             if (!exc) {
                 goto fail;
             }
diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index 5048d9c..47d8f56 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -5258,7 +5258,7 @@
     CDataObject *result;
     if (0 == cast_check_pointertype(ctype))
         return NULL;
-    result = (CDataObject *)PyObject_CallFunctionObjArgs(ctype, NULL);
+    result = (CDataObject *)_PyObject_CallNoArg(ctype);
     if (result == NULL)
         return NULL;
 
diff --git a/Modules/_ctypes/callbacks.c b/Modules/_ctypes/callbacks.c
index b958f30..2c57d6b 100644
--- a/Modules/_ctypes/callbacks.c
+++ b/Modules/_ctypes/callbacks.c
@@ -181,7 +181,7 @@
             */
         } else if (dict) {
             /* Hm, shouldn't we use PyCData_AtAddress() or something like that instead? */
-            CDataObject *obj = (CDataObject *)PyObject_CallFunctionObjArgs(cnv, NULL);
+            CDataObject *obj = (CDataObject *)_PyObject_CallNoArg(cnv);
             if (!obj) {
                 PrintError("create argument %d:\n", i);
                 Py_DECREF(cnv);
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index b198857..6003476 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -3197,7 +3197,7 @@
     PySSL_END_ALLOW_THREADS_S(pw_info->thread_state);
 
     if (pw_info->callable) {
-        fn_ret = PyObject_CallFunctionObjArgs(pw_info->callable, NULL);
+        fn_ret = _PyObject_CallNoArg(pw_info->callable);
         if (!fn_ret) {
             /* TODO: It would be nice to move _ctypes_add_traceback() into the
                core python API, so we could use it to add a frame here */
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index 95ea4f7..e7e34ef 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -951,7 +951,7 @@
             return NULL;
         return math_1_to_int(number, ceil, 0);
     }
-    result = PyObject_CallFunctionObjArgs(method, NULL);
+    result = _PyObject_CallNoArg(method);
     Py_DECREF(method);
     return result;
 }
@@ -991,7 +991,7 @@
             return NULL;
         return math_1_to_int(number, floor, 0);
     }
-    result = PyObject_CallFunctionObjArgs(method, NULL);
+    result = _PyObject_CallNoArg(method);
     Py_DECREF(method);
     return result;
 }
@@ -1542,7 +1542,7 @@
                          Py_TYPE(number)->tp_name);
         return NULL;
     }
-    result = PyObject_CallFunctionObjArgs(trunc, NULL);
+    result = _PyObject_CallNoArg(trunc);
     Py_DECREF(trunc);
     return result;
 }
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index bec7699..fee5711 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -902,7 +902,7 @@
             goto error_exit;
         }
 
-        o = to_cleanup = PyObject_CallFunctionObjArgs(func, NULL);
+        o = to_cleanup = _PyObject_CallNoArg(func);
         Py_DECREF(func);
         if (NULL == o) {
             goto error_exit;
@@ -12046,7 +12046,7 @@
                             Py_TYPE(path)->tp_name);
     }
 
-    path_repr = PyObject_CallFunctionObjArgs(func, NULL);
+    path_repr = _PyObject_CallNoArg(func);
     Py_DECREF(func);
     if (NULL == path_repr) {
         return NULL;