bug#23933: 25.1.50; Run a buffer-local hook with mapc

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: tino.calancha@gmail.com,  23933@debbugs.gnu.org,  kifer@cs.stonybrook.edu
> Date: Sun, 10 Jul 2016 13:01:55 -0400
> 
> >> after-quit-hook-internal is a variable, not a hook.
> > Then how come it includes t in its value?
> 
> A variable can very well hold a list with t inside.  As to why/where was
> this t added, I don't know.  It's probably a good idea to try and track
> it down.  Maybe because the value of that var was copied from the value
> of an actual hook.

Tino, can you figure out why t is there?  Perhaps the solution is
simply to remove it?