Old patrol.lua: fix indenting and add deprecation message

data/ai/lua/patrol.lua

@@ -1,33 +1,36 @@
-function patrol_gen(n, wp) 	-- n is the name of the unit, like Kiressh
-				-- wp - a table of waypoint tables of form {x,y}
-
-	local unit = wesnoth.get_units({name=n})[1]
-
-	local x, y = unit.x, unit.y
-	local wpn = 1 --WayPoint Number - we have to remember which waypoint we are heading to
-
-	if (x == wp[1].x and y == wp[1].y) then
-		wpn = wpn + 1
-		--w1, w2 = w2, w2 -- if we are standing on the first waypoint, swap them
-	end
-
-	--local waypoints = {w1, w2}	  -- this form might be just received from the args
-	local wpcount = # wp 
-
-
-	local patrol = {}
-
-	patrol.exec = function()
-		x, y = unit.x, unit.y
-		if (x == wp[wpn].x and y == wp[wpn].y) then
-			wpn = wpn % wpcount + 1 -- advance by one waypoint(this construct loops in range [1, wpcount])
-		end
-		ai.move_full(unit, wp[wpn].x, wp[wpn].y) -- @note: should we change this to ai.move()?
-	end
-
-	patrol.eval = function()
-		return 300000
-	end
-
-	return patrol
+function patrol_gen(n, wp)
+    -- n is the name of the unit, like Kiressh
+    -- wp - a table of waypoint tables of form {x,y}
+
+    wesnoth.message('data/ai/lua/patrol.lua is deprecated. Use the Patrols Micro AI instead.')
+
+    local unit = wesnoth.get_units({name=n})[1]
+
+    local x, y = unit.x, unit.y
+    local wpn = 1 --WayPoint Number - we have to remember which waypoint we are heading to
+
+    if (x == wp[1].x and y == wp[1].y) then
+        wpn = wpn + 1
+        --w1, w2 = w2, w2 -- if we are standing on the first waypoint, swap them
+    end
+
+    --local waypoints = {w1, w2}      -- this form might be just received from the args
+    local wpcount = # wp
+
+
+    local patrol = {}
+
+    patrol.exec = function()
+        x, y = unit.x, unit.y
+        if (x == wp[wpn].x and y == wp[wpn].y) then
+            wpn = wpn % wpcount + 1 -- advance by one waypoint(this construct loops in range [1, wpcount])
+        end
+        ai.move_full(unit, wp[wpn].x, wp[wpn].y) -- @note: should we change this to ai.move()?
+    end
+
+    patrol.eval = function()
+        return 300000
+    end
+
+    return patrol
 end