bug#43389: 28.0.50; Emacs memory leaks

[Eli Zaretskii]

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: Andreas Schwab <schwab@linux-m68k.org>,  43389@debbugs.gnu.org,
>  RLAdams@AdamsInfoServ.Com
> Date: Tue, 10 Nov 2020 14:26:10 +0100
> 
> (gdb) call malloc_info(0, stdout)
> 'malloc_info' has unknown return type; cast the call to its declared return 
> type

Compliance!

  (gdb) call (int)malloc_info (0, stdout)

(I would actually try stderr instead of stdout, but I yield to
Andreas's expertise here.)