GitLab

* window.c (delete_window, Fset_window_configuration): Call
delete_all_subwindows with window as argument.
(delete_all_subwindows): Take a window as argument and not a
structure.  Rewrite.

* window.h: delete_all_subwindows now takes a Lisp_Object as
argument.

* frame.c (delete_frame): Call delete_all_subwindows with root
window as argument.