Add a new buffer-local variable `minor-modes'

* lisp/emacs-lisp/easy-mmode.el (define-minor-mode): Keep
`minor-modes' updated.
* src/buffer.c (bset_minor_modes, Fmake_indirect_buffer)
(reset_buffer, init_buffer_once): Initialise `minor-modes'.
(syms_of_buffer): Add `minor-modes' as a new permanently-local
variable.

* src/buffer.h (struct buffer): Add minor_modes_.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/buffer.h b/src/buffer.h
index 790291f1185..0668d16608b 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -338,6 +338,9 @@ struct buffer
   /* Symbol naming major mode (e.g., lisp-mode).  */
   Lisp_Object major_mode_;
 
+  /* Symbol listing all currently enabled minor modes.  */
+  Lisp_Object minor_modes_;
+
   /* Pretty name of major mode (e.g., "Lisp"). */
   Lisp_Object mode_name_;