Fixed a major bug with the sign chest protection. It replaced the second line of the sign with "[Lock]".

src/com/sk89q/worldguard/bukkit/WorldGuardBlockListener.java

@@ -483,7 +483,7 @@ public void onSignChange(SignChangeEvent event) {
                     event.setCancelled(true);
                     return;
                 } else {
-                    event.setLine(1, "[Lock]");
+                    event.setLine(0, "[Lock]");
                     player.sendMessage(ChatColor.YELLOW
                             + "A chest or double chest above is now protected.");
                 }