fix stack array init warning

Author: dura0ok

Python/ceval.c

@@ -1814,7 +1814,7 @@ _PyEvalFramePushAndInit_Ex(PyThreadState *tstate, _PyStackRef func,
     PyObject *kwnames = NULL;
     _PyStackRef *newargs;
     PyObject *const *object_array = NULL;
-    _PyStackRef stack_array[8];
+    _PyStackRef stack_array[8] = {};
     if (has_dict) {
         object_array = _PyStack_UnpackDict(tstate, _PyTuple_ITEMS(callargs), nargs, kwargs, &kwnames);
         if (object_array == NULL) {