bug#56607: 29.0.50; (setq auto-resize-tool-bars 'grow-only) has no effect (pgtk)

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sat, 16 Jul 2022 21:52:09 -0400
> From: Richard Hansen <rhansen@rhansen.org>
> 
> emacs -Q
> M-: (setq auto-resize-tool-bars 'grow-only) RET
> C-s
> 
> The tool bar now shows a ridiculously oversized marine life ring icon on the "Help" button, and the height of the tool bar has grown to accommodate the icon's size.
> 
> C-g
> 
> Expected behavior: The tool bar reverts back to how it was before C-s was pressed, except its height stays the same.
> 
> Actual behavior: The tool bar reverts back to how it was before, including reverting to its original height.

I cannot reproduce this because on my system the Help button doesn't
get the "ridiculously oversized marine life ring icon", so the tool
bar doesn't resize.  But I see something suspicious in the code which
handles this feature:

  if (!NILP (Vauto_resize_tool_bars))
    {
      bool change_height_p = true;  <<<<<<<<<<<<<<<<<<<<<<

AFAIU, that initialization should have been to 'false', not 'true'.
Can you try this on your system and see if such a change gives good
results?

Thanks.