fix water check for soil (3 horizontal, 1 below)

soil.lua

@@ -54,9 +54,9 @@ minetest.register_abm({
 		-- check if there is water nearby and change soil accordingly
 --		if minetest.find_node_near(pos, 3, {"group:water"}) then
 
-		-- check if water is within 3 nodes horizontally and 2 below
+		-- check if water is within 3 nodes horizontally and 1 below
 		if #minetest.find_nodes_in_area(
-				{x = pos.x + 3, y = pos.y + 2, z = pos.z + 3},
+				{x = pos.x + 3, y = pos.y - 1, z = pos.z + 3},
 				{x = pos.x - 3, y = pos.y    , z = pos.z - 3},
 				{"group:water"}) > 0 then