bug#32531: Emacs 27 crash with `memory-use-counts'

[Eli Zaretskii]

> From: Karl Otness <karl@karlotness.com>
> Date: Sat, 25 Aug 2018 22:50:25 -0500
> 
> I've observed a crash with Emacs master (version as of a couple days
> ago). To reproduce with "emacs -q" just eval (memory-use-counts) in
> scratch. Printing or manipulating the list causes the crash.
> 
> The cause seems to that listn is called with a length of 8 rather than
> 7 in the source of memory-use-counts (alloc.c line 7020) when only
> seven elements are specified. Might be leftover from getting rid of
> misc. Bumping that number down to 7 fixed the crash for me.

Thanks, fixed.