From: Richard M. Stallman <rms@gnu.org>
Date: Sat, 21 Dec 2002 17:59:27 +0000 (+0000)
Subject: Comment change.
X-Git-Tag: ttn-vms-21-2-B4~11959
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=9f7d9210189689aab2787879d65f58a8abdfb208;p=emacs.git

Comment change.
---

diff --git a/src/alloc.c b/src/alloc.c
index 29cb1de5826..5cb34b9ed45 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -341,7 +341,12 @@ int dont_register_blocks;
 
 struct mem_node
 {
-  struct mem_node *left, *right, *parent;
+  /* Children of this node.  These pointers are never NULL.  When there
+     is no child, the value is MEM_NIL, which points to a dummy node.  */
+  struct mem_node *left, *right;
+
+  /* The parent of this node.  In the root node, this is NULL.  */
+  struct mem_node *parent;
 
   /* Start and end of allocated region.  */
   void *start, *end;