tsocket/bsd: more correctly check if the cached tevent_fd is still valid
I some cases the pointer value of tevent_context is the same again,
if we do something like:
ev1 = tevent_context_init();
...
fde = tevent_add_fd(ev1, fd, TEVENT_FD_READ...);
...
talloc_free(ev1);
...
ev2 = tevent_context_init();
if (ev1 == ev2) {
/* this can happen! */
}
if (tevent_fd_get_flags(fde) == 0) {
/* this is always true */
}
But the "talloc_free(ev1)" will set fde->event_ctx to NULL
and tevent_fd_get_flags() will always return 0.
metze