Fix "Buffers->Frames" submenu in daemon sessions

* lisp/menu-bar.el (menu-bar-update-buffers): Detect the initial
frame by its special terminal's name.  (Bug#53740)

* src/terminal.c (init_initial_terminal): Add comment about using
the initial-terminal's name in menu-bar.el.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/terminal.c b/src/terminal.c
index 3db80f4b1ff..80f3aed7006 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -622,6 +622,8 @@ init_initial_terminal (void)
     emacs_abort ();
 
   initial_terminal = create_terminal (output_initial, NULL);
+  /* Note: menu-bar.el:menu-bar-update-buffers knows about this
+     special name of the initial terminal.  */
   initial_terminal->name = xstrdup ("initial_terminal");
   initial_terminal->kboard = initial_kboard;
   initial_terminal->delete_terminal_hook = &delete_initial_terminal;