fix accidental argument name reuse in C macro

Cython/Utility/CythonFunction.c

@@ -75,12 +75,6 @@ static int __Pyx_CyFunction_init(void);
 //@requires: CommonTypes.c::FetchCommonType
 ////@requires: ObjectHandling.c::PyObjectGetAttrStr
 
-#if PY_VERSION_HEX < 0x030500A0
-#define __Pyx_CyFunction_weakreflist(func) ((func)->func_weakreflist)
-#else
-#define __Pyx_CyFunction_weakreflist(func) ((func)->func.m_weakreflist)
-#endif
-
 static PyObject *
 __Pyx_CyFunction_get_doc(__pyx_CyFunctionObject *op, CYTHON_UNUSED void *closure)
 {
@@ -434,6 +428,13 @@ static PyMethodDef __pyx_CyFunction_methods[] = {
 };
 
 
+#if PY_VERSION_HEX < 0x030500A0
+#define __Pyx_CyFunction_weakreflist(cyfunc) ((cyfunc)->func_weakreflist)
+#else
+#define __Pyx_CyFunction_weakreflist(cyfunc) ((cyfunc)->func.m_weakreflist)
+#endif
+
+
 static PyObject *__Pyx_CyFunction_New(PyTypeObject *type, PyMethodDef *ml, int flags, PyObject* qualname,
                                       PyObject *closure, PyObject *module, PyObject* globals, PyObject* code) {
     __pyx_CyFunctionObject *op = PyObject_GC_New(__pyx_CyFunctionObject, type);