bpo-46347: Yet another fix in the erorr path of PyEval_EvalCodeEx (#30554)

Author: 1st1

Python/ceval.c

@@ -6113,7 +6113,6 @@ PyEval_EvalCodeEx(PyObject *_co, PyObject *globals, PyObject *locals,
  }
  newargs = PyMem_Malloc(sizeof(PyObject *)*(kwcount+argcount));
  if (newargs == NULL) {
- Py_DECREF(kwnames);
  goto fail;
  }
  for (int i = 0; i < argcount; i++) {