Create missing tables

After a failure to move the digtron with its metadata, some nodes were
broken. This worked around crashes that occurred if the inventory table
was missing.

1 files changed, 4 insertions, 1 deletions

diff --git a/nodes/node_duplicator.lua b/nodes/node_duplicator.lua
index 7d20a65..4533bae 100644
--- a/nodes/node_duplicator.lua
+++ b/nodes/node_duplicator.lua
@@ -146,6 +146,9 @@ minetest.register_node("digtron:duplicator", {
 			-- clear inventories of image's nodes			
 			for _, node_image in pairs(layout.inventories) do
 				local main_inventory = node_image.meta.inventory.main
+				if type(main_inventory) ~= "table" then
+					main_inventory = {}
+				end
 				for index, _ in pairs(main_inventory) do
 					main_inventory[index] = ItemStack(nil)
 				end
@@ -175,4 +178,4 @@ minetest.register_node("digtron:duplicator", {
 		end
 	end,
 
-})
\ No newline at end of file
+})