* alloc.c, bytecode.c, ccl.c, coding.c, composite.c, data.c, dosfns.c:

* alloc.c, bytecode.c, ccl.c, coding.c, composite.c, data.c, dosfns.c:
* font.c, image.c, keyboard.c, lread.c, menu.c, minibuf.c, msdos.c:
* print.c, syntax.c, window.c, xmenu.c, xselect.c: Replace direct
access to `contents' member of Lisp_Vector objects with AREF and ASET
where appropriate.