Issue 3739: The unicode-internal encoder now reports the number of *characters*
consumed like any other encoder (instead of the number of bytes).
diff --git a/Modules/_codecsmodule.c b/Modules/_codecsmodule.c
index 6877238..495e4ff 100644
--- a/Modules/_codecsmodule.c
+++ b/Modules/_codecsmodule.c
@@ -646,7 +646,7 @@
 	data = PyUnicode_AS_DATA(obj);
 	size = PyUnicode_GET_DATA_SIZE(obj);
 	return codec_tuple(PyString_FromStringAndSize(data, size),
-			   size);
+			   PyUnicode_GET_SIZE(obj));
     }
     else {
 	if (PyObject_AsReadBuffer(obj, (const void **)&data, &size))