Adding missing object access hook invocations

Hackers,

While working on object access hooks, I noticed several locations where I would expect the hook to be invoked, but no actual invocation.  I think this just barely qualifies as a bug.  It's debatable because whether it is a bug depends on the user's expectations and whether not invoking the hook in these cases is defensible.  Does anybody have any recollection of an intentional choice not to invoke in these locations?

Patch attached.