fix tube and pipe drops

pipes.lua

@@ -128,10 +128,12 @@ if REGISTER_COMPATIBILITY then
 	minetest.register_node(cempty, {
 		drawtype = "airlike",
 		groups = {not_in_creative_inventory = 1, pipe_to_update = 1},
+		drop = "pipeworks:pipe_1_empty",
 	})
 	minetest.register_node(cloaded, {
 		drawtype = "airlike",
 		groups = {not_in_creative_inventory = 1, pipe_to_update = 1},
+		drop = "pipeworks:pipe_1_empty",
 	})
 	for xm = 0, 1 do
 	for xp = 0, 1 do

tubes.lua

@@ -179,6 +179,7 @@ pipeworks.register_tube = function(name, desc, plain, noctrs, ends, short, inv,
 						       basename = name,
 						       groups = {not_in_creative_inventory = 1, tube_to_update = 1},
 						       tube = {connect_sides = {front = 1, back = 1, left = 1, right = 1, top = 1, bottom = 1}},
+							   drop = name.."_1",
 			})
 			table.insert(pipeworks.tubenodes,cname)
 			for xm = 0, 1 do