Support default and MCL2

Fix a sneak bug when using more than one sling at a time

README.md

@@ -1,5 +1,5 @@
 # Sling
-License: LGPLv3/CC BY-SA 3.0
+License: LGPLv2.1/CC BY-SA 3.0. Sounds derivates from [speedygonzo](https://freesound.org/people/speedygonzo/sounds/257654/).
 
 ![Screenshot](https://github.com/tacotexmex/sling/raw/master/screenshot.png "Screenshot")
 

depends.txt

@@ -1,3 +1,4 @@
-default
+default?
+mcl_core?
 throwing
 mobs?

init.lua

@@ -17,7 +17,7 @@ throwing.register_bow("sling:sling", {
     end
   end,
   spawn_arrow_entity = function(pos, arrow, player)
-    local obj = minetest.add_entity(pos, "sling:sling_entity")
+    local obj = minetest.add_entity(pos, "sling:sling_entity", tostring(sling_sneak))
     obj:set_properties{
       textures = {arrow},
     }
@@ -32,8 +32,11 @@ minetest.register_entity("sling:sling_entity", throwing.make_arrow_def{
   target = throwing.target_node,
   on_hit_sound = "",
   on_throw_sound = "",
+  on_activate = function(self, staticdata)
+          self.sneak = staticdata == "true"
+  end,
   on_hit = function(self, pos, last_pos, node, object, hitter, data)
-    if sling_sneak == true then
+    if self.sneak then
       data.itemstack:set_count(1)
     end
     minetest.spawn_item(
@@ -50,7 +53,16 @@ minetest.register_entity("sling:sling_entity", throwing.make_arrow_def{
   end
 })
 
-if mobs ~= nil and mobs.mod == "redo" then
+if minetest.get_modpath("mcl_core") ~= nil then
+  minetest.register_craft({
+    output = "sling:sling",
+    recipe = {
+      {"mcl_mobitems:string", "", "mcl_mobitems:string"},
+      {"mcl_mobitems:string", "", "mcl_mobitems:string"},
+      {"mcl_mobitems:string", "mcl_mobitems:leather", "mcl_mobitems:string"}
+    }
+  })
+elseif mobs ~= nil and mobs.mod == "redo" then
   minetest.register_craft({
   	output = "sling:sling",
   	recipe = {