Prevent potential crash caused by moss growth ABM

diff --git a/mods/default/functions.lua b/mods/default/functions.lua
index e1e3e186652741345287b691f5c93cdb0850fdc1..183b5597bbbf703993ad67462df1396db8d20813 100644 (file)
--- a/mods/default/functions.lua
+++ b/mods/default/functions.lua
@@ -560,7 +560,9 @@ minetest.register_abm({
        catch_up = false,
        action = function(pos, node)
                node.name = moss_correspondences[node.name]
-               minetest.set_node(pos, node)
+               if node.name then
+                       minetest.set_node(pos, node)
+               end
        end
 })