* Added a comment clarifying that TomTom_Waypoints API is private

diff --git a/TomTom.lua b/TomTom.lua
index 724ba26..548507c 100755
--- a/TomTom.lua
+++ b/TomTom.lua
@@ -648,8 +648,8 @@ function TomTom:AddZWaypoint(c, z, x, y, desc, persistent, minimap, world)
 		for uid in pairs(waypoints[zone]) do
 			local data = waypoints[uid]
 			if data.title == desc and data.coord == coord then
-				-- This is a duplicate waypoint
-				return
+				-- This is a duplicate waypoint, so return that uid
+				return uid
 			end
 		end
 	end
diff --git a/TomTom_Waypoints.lua b/TomTom_Waypoints.lua
index 135dd68..46ddfef 100644
--- a/TomTom_Waypoints.lua
+++ b/TomTom_Waypoints.lua
@@ -1,5 +1,11 @@
 --[[--------------------------------------------------------------------------
 --  TomTom - A navigational assistant for World of Warcraft
+--
+--  This file contains the internal implementation of TomTom's waypoints.
+--  None of these functions should be called directly by addons if they want
+--  the waypoints to obey normal TomTom options and behavior.  In otherwords
+--  don't call TomTom:SetWaypoint() or TomTom:ClearWaypoint(), use the public
+--  TomTom:AddZWaypoint() and TomTom:RemoveWaypoint() instead.
 ----------------------------------------------------------------------------]]

 -- Import Astrolabe for locations