Fix error when calling minetest.node_punch without a pointed_thing

diff --git a/builtin/item.lua b/builtin/item.lua
index de546c2e7eab4c29dd0b4e17bec0ecee3ebdd973..002c14f5ef79e5b6fa951e0e15b3dd41d6ef97bb 100644 (file)
--- a/builtin/item.lua
+++ b/builtin/item.lua
@@ -367,7 +367,7 @@ function minetest.node_punch(pos, node, puncher, pointed_thing)
                -- Copy pos and node because callback can modify them
                local pos_copy = vector.new(pos)
                local node_copy = {name=node.name, param1=node.param1, param2=node.param2}
-               local pointed_thing_copy = copy_pointed_thing(pointed_thing)
+               local pointed_thing_copy = pointed_thing and copy_pointed_thing(pointed_thing) or nil
                callback(pos_copy, node_copy, puncher, pointed_thing_copy)
        end
 end