Minor beautification

Author: rhettinger

Modules/itertoolsmodule.c

@@ -167,14 +167,13 @@ batched_next(batchedobject *bo)
 
  null_item:
     if (PyErr_Occurred()) {
-        if (PyErr_ExceptionMatches(PyExc_StopIteration)) {
-            PyErr_Clear();
-        } else {
-            /* input raised an exception other than StopIteration */
+        if (!PyErr_ExceptionMatches(PyExc_StopIteration)) {
+            /* Input raised an exception other than StopIteration */
             Py_CLEAR(bo->it);
             Py_DECREF(result);
             return NULL;
         }
+        PyErr_Clear();
     }
     if (i == 0) {
         Py_CLEAR(bo->it);