Replace PyUnicodeObject type by PyObject

 * _PyUnicode_CheckConsistency() now takes a PyObject* instead of void*
 * Remove now useless casts to PyObject*
diff --git a/Include/unicodeobject.h b/Include/unicodeobject.h
index dc3bad7..8e29f34 100644
--- a/Include/unicodeobject.h
+++ b/Include/unicodeobject.h
@@ -2000,9 +2000,8 @@
 #endif /* Py_LIMITED_API */
 
 #if defined(Py_DEBUG) && !defined(Py_LIMITED_API)
-/* FIXME: use PyObject* type for op */
 PyAPI_FUNC(int) _PyUnicode_CheckConsistency(
-    void *op,
+    PyObject *op,
     int check_content);
 #endif