# HG changeset patch
# User Sergey Poznyakoff <gray@gnu.org.ua>
# Date 1177848147 0
# Node ID 8a62dff89d5a94e1a4f0543a96936eb0d6044935
# Parent  4ae117cb36cdd9c9211e235e2e75c5765080648a
(hol_cluster_cmp): Reverse comparison.  Change proposed by Sven Verdoolaege.

diff --git a/lib/argp-help.c b/lib/argp-help.c
--- a/lib/argp-help.c
+++ b/lib/argp-help.c
@@ -673,10 +673,12 @@
 hol_cluster_cmp (const struct hol_cluster *cl1, const struct hol_cluster *cl2)
 {
   /* If one cluster is deeper than the other, use its ancestor at the same
-     level, so that finding the common ancestor is straightforward.  */
-  while (cl1->depth < cl2->depth)
+     level, so that finding the common ancestor is straightforward.
+     
+     clN->depth > 0 means that clN->parent != NULL (see hol_add_cluster) */
+  while (cl1->depth > cl2->depth)
     cl1 = cl1->parent;
-  while (cl2->depth < cl1->depth)
+  while (cl2->depth > cl1->depth)
     cl2 = cl2->parent;
 
   /* Now reduce both clusters to their ancestors at the point where both have