fix off-by-1 traceback in "--remove-older-than nB"

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@751 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

branches/r1-0/rdiff-backup/CHANGELOG

+New in v1.0.5 (????/??/??)
+--------------------------
+
+Fix a traceback due to an off-by-1 error in "--remove-older-than nB".
+
+
 New in v1.0.4 (2006/01/15)
 --------------------------
 

branches/r1-0/rdiff-backup/rdiff_backup/Time.py

@@ -187,7 +187,7 @@ def time_from_session(session_num, rp = None):
 	session_times = Globals.rbdir.conn.restore.MirrorStruct \
 					.get_increment_times()
 	session_times.sort()
-	if len(session_times) < session_num:
+	if len(session_times) <= session_num:
 		return session_times[0] # Use oldest if two few backups
 	return session_times[-session_num-1]