add branch hint

b797b427 · Stefan Behnel · 447e20af · b797b427
Commit b797b427 authored Jul 31, 2017 by Stefan Behnel
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Cython/Utility/AsyncGen.c Cython/Utility/AsyncGen.c +1 -1

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--- a/Cython/Utility/AsyncGen.c
+++ b/Cython/Utility/AsyncGen.c
@@ -224,7 +224,7 @@ __Pyx_async_gen_init_hooks(__pyx_PyAsyncGenObject *o)
        Py_INCREF(firstiter);
        res = __Pyx_PyObject_CallOneArg(firstiter, (PyObject*)o);
        Py_DECREF(firstiter);
-        if (res == NULL) {
+        if (unlikely(res == NULL)) {
            return 1;
        }
        Py_DECREF(res);