[gnumeric] add comment

[Andreas J. Guelzow <guelzow src gnome org>]

commit dc1b6f7dd817e91b0841072416dfc99e8b25b4fc
Author: Andreas J Guelzow <aguelzow pyrshep ca>
Date:   Wed Aug 1 21:20:01 2012 -0600

    add comment

 plugins/openoffice/openoffice-read.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/openoffice/openoffice-read.c b/plugins/openoffice/openoffice-read.c
index aa6144c..95b18cd 100644
--- a/plugins/openoffice/openoffice-read.c
+++ b/plugins/openoffice/openoffice-read.c
@@ -2769,6 +2769,7 @@ odf_z_idx_compare (gconstpointer a, gconstpointer b)
 	g_return_val_if_fail (za != NULL, -1);
 	g_return_val_if_fail (zb != NULL, 1);
 
+	/* We are sorting indices in decreasing order! */
 	return (*zb - *za);
 }