fix crash with animated nodes

init.lua

@@ -59,7 +59,7 @@ end
 
 
 local function getTiles(nd)
-	return nd.tiles or nd.tile_images or nil
+	return nd.tiles or nd.tile_images
 end
 
 local function dumpNodes(playerName, param)
@@ -78,8 +78,9 @@ local function dumpNodes(playerName, param)
 	local header = [[
 # This file is generated by dumpnodes.
 # You can use this to generate a colors.txt file that can be used by minetestmapper.
-# To generate a colors.txt you can use the program you find here: 
+# To generate a colors.txt you can use the program you find here: https://bitbucket.org/adrido/makecolors
 # Or you use MinetestMapperGui that have the conversation tool builtin.
+# https://bitbucket.org/adrido/minetestmappergui
 ]]
 	out:write(header)
 	for nodeName, def in orderedPairs(minetest.registered_nodes) do
@@ -87,19 +88,21 @@ local function dumpNodes(playerName, param)
 		if(def.drawtype ~="arilike" and tiles) then
 			local mod, name = nodeName:match('(.*):(.*)')
 			if mod~="" and name~="" then
-
-				local tile = tiles[1]
-				if type(tile) == 'table' then
-					tile = tile.name
+				
+				local tile = (tiles[1] and tiles[1].name) or tiles[1] or tiles.name
+				if(type(tile) == "string") then
+					
+					tile = (tile .. '^'):match('(.-)^')
+					if(mod ~= currentMod)then
+						out:write('\n# ' .. mod .. '\n')
+						currentMod = mod
+					end
+					out:write(nodeName .. ' ' .. tile .. '\n')
+					print(nodeName.." : " ..tile)
+					counter = counter +1 --lua sucks!
+				else
+					minetest.log("warning",nodeName..": ".. dump(def));
 				end
-				tile = (tile .. '^'):match('(.-)^')
-				if(mod ~= currentMod)then
-					out:write('\n# ' .. mod .. '\n')
-					currentMod = mod
-				end
-				out:write(nodeName .. ' ' .. tile .. '\n')
-				print(nodeName.." : " ..tile)
-				counter = counter +1 --lua sucks!
 			end
 		end	
 	end