Documentation of immutability of watch flags

[Magnus Reftel]

Hi all,

from reading the source, it appears that the return value of
dbus_watch_get_flags can never change during the lifetime of a watch,
but there is as far as I can see nothing in the documentation that
guarantees that. Would it be possible to add something like the
following to the @defgroup DBusWatch DBusWatch?

* The flags of a DBusWatch specify what conditions should be watched. The flags
* are immutable, and do not change during the lifetime of a DBusWatch.

BR
Magnus Reftel