New macro to iterate over all buffers, miscellaneous cleanups.

* lisp.h (all_buffers): Remove declaration.
* buffer.h (all_buffers): Add declaration, with comment.
(for_each_buffer): New macro.
* alloc.c (Fgarbage_collect, mark_object): Use it.
* buffer.c (Fkill_buffer, Fbuffer_swap_text, Fset_buffer_multibyte)
(init_buffer): Likewise.
* data.c (Fset_default): Likewise.
* coding.c (code_conversion_restore): Remove redundant check
for dead buffer.
* buffer.c (Fkill_buffer): Likewise.  Remove obsolete comment.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/data.c b/src/data.c
index 22546349677..84bd347b136 100644
--- a/src/data.c
+++ b/src/data.c
@@ -1401,7 +1401,7 @@ for this variable.  */)
               {
                 struct buffer *b;
 
-                for (b = all_buffers; b; b = b->header.next.buffer)
+                for_each_buffer (b)
                   if (!PER_BUFFER_VALUE_P (b, idx))
                     PER_BUFFER_VALUE (b, offset) = value;
               }