Generate lily pads also in 2 node deep water in swamps

mods/MAPGEN/mcl_biomes/init.lua

@@ -2042,15 +2042,26 @@ local function register_decorations()
 	})
 
 	-- Lily pad
+
+	local lily_schem = {
+		{ name = "mcl_core:water_source" },
+		{ name = "mcl_flowers:waterlily" },
+	}
+
+	-- Spawn them in shallow water at ocean level in swamplands.
+	-- Tweak lilydepth to change the maximum water depth
+	local lilydepth = 2
+
+	for d=1, lilydepth do
+		local height = d + 2
+		local y = 1 - d
+		table.insert(lily_schem, 1, { name = "air", prob = 0 })
+
 		minetest.register_decoration({
 			deco_type = "schematic",
 			schematic = {
-			size = { x=1, y=3, z=1 },
-			data = {
-				{ name = "mcl_core:water_source", prob = 0 },
-				{ name = "mcl_core:water_source" },
-				{ name = "mcl_flowers:waterlily", param1 = 255 },
-			},
+				size = { x=1, y=height, z=1 },
+				data = lily_schem,
 			},
 			place_on = "mcl_core:dirt",
 			sidelen = 16,
@@ -2062,11 +2073,12 @@ local function register_decorations()
 				octaves = 6,
 				persist = 0.7,
 			},
-		y_min = 0,
-		y_max = 0,
+			y_min = y,
+			y_max = y,
 			biomes = { "swampland_shore" },
 			rotation = "random",
 		})
+	end
 
 	-- Melon
 	minetest.register_decoration({