bug#57320: 29.0.50; Lucid menus can't be operated with the mouse

[Eli Zaretskii]

> Cc: Stefan <monnier@iro.umontreal.ca>, 57320@debbugs.gnu.org
> From: Visuwesh <visuweshm@gmail.com>
> Date: Sun, 04 Sep 2022 11:24:05 +0530
> 
>     2879        if (XtGrabPointer ((Widget)mw, False,
>     (gdb) stepi
>     0x0000555555979490        2879      if (XtGrabPointer ((Widget)mw, False,
>     (gdb) finish

Too soon: you are still not inside XtGrabPointer.  Keep typing "stepi"
(or just RET) until GDB says that it's either inside XtGrabPointer or
inside a function with no line information, and shows a machine
instruction instead of source line.  _Then_ type "finish".