Generalize common compile-time constants.

* lisp.h (header_size, bool_header_size, word_size): Now here.
(struct Lisp_Vector): Add comment.
(struct Lisp_Bool_Vector): Move up to define handy constants.
(VECSIZE, PSEUDOVECSIZE): Simplify.
(SAFE_ALLOCA_LISP): Use new constant.  Adjust indentation.
* buffer.c, buffer.h, bytecode.c, callint.c, eval.c, fns.c:
* font.c, fontset.c, keyboard.c, keymap.c, macros.c, menu.c:
* msdos.c, w32menu.c, w32term.h, window.c, xdisp.c, xfaces.c:
* xfont.c, xmenu.c: Use word_size where appropriate.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/menu.c b/src/menu.c
index eaf05ff3cba..3e466b46aa3 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -976,7 +976,7 @@ find_and_return_menu_selection (FRAME_PTR f, int keymaps, void *client_data)
 
   prefix = entry = Qnil;
   i = 0;
-  subprefix_stack = alloca (menu_items_used * sizeof (Lisp_Object));
+  subprefix_stack = alloca (menu_items_used * word_size);
 
   while (i < menu_items_used)
     {