python-stdlib/datetime/datetime.py: Add a TODO.

There's code there that doesn't work properly with timezones.
The fix is left for the future, but at least I want to mark it as dodgy
to make it more likely I remember to go back and fix it.

Author: jonfoster

python-stdlib/datetime/datetime.py

@@ -831,6 +831,7 @@ def timetuple(self):
             conv = _tmod.gmtime
             epoch = datetime.EPOCH.replace(tzinfo=None)
         else:
+            # TODO this is wrong when a timezone is set
             conv = _tmod.localtime
             epoch = datetime.EPOCH
         return conv(round((self - epoch).total_seconds()))