Tweak item name display offset, fix bugs

mods/HUD/mcl_item_names/depends.txt

@@ -0,0 +1 @@
+hudbars?

mods/HUD/mcl_item_names/init.lua

@@ -4,18 +4,10 @@ local wield = {}
 local huds = {}
 local dtimes = {}
 local dlimit = 3  -- HUD element will be hidden after this many seconds
-local air_hud_mod = minetest.get_modpath("4air")
-local hud_mod = minetest.get_modpath("hud")
-local hudbars_mod = minetest.get_modpath("hudbars")
 
 local function set_hud(player)
 	local player_name = player:get_player_name() 
-	local off = {x=0, y=-70}
-	if air_hud_mod or hud_mod then
-		off.y = off.y - 20
-	elseif hudbars_mod then
-		off.y = off.y + 13
-	end
+	local off = {x=0, y=-136}
 	huds[player_name] = player:hud_add({
 		hud_elem_type = "text",
 		position = {x=0.5, y=1},
@@ -48,6 +40,11 @@ minetest.register_globalstep(function(dtime)
 			if huds[player_name] then 
 				local def = minetest.registered_items[wstack]
 				local desc = def and def.description or ""
+				-- Cut off item description after first newline
+				local firstnewline = string.find(desc, "\n")
+				if firstnewline then
+					desc = string.sub(desc, 1, firstnewline-1)
+				end
 				player:hud_change(huds[player_name], 'text', desc)
 			end
 		end