bug#36597: 27.0.50; rehash hash tables eagerly in pdumper

[Eli Zaretskii]

> Date: Tue, 11 Aug 2020 21:35:52 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: larsi@gnus.org, 36597@debbugs.gnu.org, pipcet@gmail.com
> 
> I don't understand why it's needed; there's nothing wrong with MinGW's
> inttypes.h header.

And, btw, Gnulib's inttypes.h does this:

  #if !defined PRIdPTR
  # ifdef INTPTR_MAX
  #  define PRIdPTR @PRIPTR_PREFIX@ "d"
  # endif
  #endif

But since MinGW's inttypes.h does provide PRIdPTR, this will do
nothing, so it cannot possibly help here.  Am I missing something?