Fix obsidian creation

mods/default/functions.lua

@@ -0,0 +1,35 @@
+-- mods/default/functions.lua
+
+--
+-- Lavacooling
+--
+
+default.cool_lava_source = function(pos)
+	minetest.set_node(pos, {name="default:obsidian"})
+	minetest.sound_play("default_cool_lava", {pos = pos,  gain = 0.25})
+end
+
+default.cool_lava_flowing = function(pos)
+	minetest.set_node(pos, {name="default:stone"})
+	minetest.sound_play("default_cool_lava", {pos = pos,  gain = 0.25})
+end
+
+minetest.register_abm({
+	nodenames = {"default:lava_flowing"},
+	neighbors = {"group:water"},
+	interval = 1,
+	chance = 1,
+	action = function(pos, node, active_object_count, active_object_count_wider)
+		default.cool_lava_flowing(pos, node, active_object_count, active_object_count_wider)
+	end,
+})
+
+minetest.register_abm({
+	nodenames = {"default:lava_source"},
+	neighbors = {"group:water"},
+	interval = 1,
+	chance = 1,
+	action = function(pos, node, active_object_count, active_object_count_wider)
+		default.cool_lava_source(pos, node, active_object_count, active_object_count_wider)
+	end,
+})

mods/default/init.lua

@@ -106,6 +106,7 @@ function default.node_sound_glass_defaults(table)
 end
 
 -- Load files
+dofile(minetest.get_modpath("default").."/functions.lua")
 dofile(minetest.get_modpath("default").."/nodes.lua")
 dofile(minetest.get_modpath("default").."/craftitems.lua")
 dofile(minetest.get_modpath("default").."/player.lua")