bug#57522: 29.0.50; Fix submenu indicator on X11 no toolkit

[Po Lu]

Eli Zaretskii <eliz@gnu.org> writes:

> AFAIK, all the implementations of menus that use the "not
> USE_X_TOOLKIT && not USE_GTK" version of x_menu_show from xmenu.c
> behave the same wrt locating sub-menus.

TTY menus use xmenu.c?

> And if you are asking about alignment of sub-menus with their parent
> menu item, then no, there's no alignment.  Never was.

Hmm.  Then I have no more objections to this change, I guess, since it
seems to have worked well enough for everyone else.