Fix crash when dropping barrel

Readme.md

@@ -5,12 +5,21 @@ Adds a variety of advanced weapons.
 ## About
 
 Depends on `modlib` and `tnt`.
-Written by LMD aka appguru(eu). Licensed under the GPLv3.
+Written by LMD aka appguru(eu). Licensed under the MIT license.
 
 ## Screenshot
 
 ![Screenshot](screenshot.png)
 
+## API
+
+```lua
+-- override this, should return true if names are opponents
+function adv_weapons.is_opponent(playername1, playername2)
+    return playername1 ~= playername2
+end
+```
+
 ## Features
 
 * Explosives
@@ -27,6 +36,7 @@ Written by LMD aka appguru(eu). Licensed under the GPLv3.
       * Go forwards/backwards on the beam
   * Turrets
     * Gatlin Gun
+      * Right-click turret base with gatlin barrel to arm
       * High reload rate, low damage & range
       * Turns slowly, so you can try dodging
       * Only attacks owners opponents
@@ -40,4 +50,4 @@ Written by LMD aka appguru(eu). Licensed under the GPLv3.
       * Can be dragged around
       * Unleashed as soon as RMB is released
 * Many more!
-  * Soon
+  * Soon

init.lua

@@ -1,5 +1,4 @@
-adv_weapons = {}
-modlib.mod.extend("adv_weapons", "main")
-modlib.mod.extend("adv_weapons", "mine")
-modlib.mod.extend("adv_weapons", "special")
-modlib.mod.extend("adv_weapons", "turret")
+modlib.mod.init()
+modlib.mod.extend"mine"
+modlib.mod.extend"special"
+modlib.mod.extend"turret"

turret.lua

@@ -52,9 +52,10 @@ minetest.register_entity("adv_weapons:turret_gatlin_barrel", {
         return self._owner
     end,
     on_step = function(self, dtime)
-        if minetest.get_node(self.object:get_pos()).name ~= "adv_weapons:turret_base" then
+        local pos = self.object:get_pos()
+        if minetest.get_node(pos).name ~= "adv_weapons:turret_base" then
             self.object:remove()
-            minetest.add_item(self.object:get_pos(), "adv_weapons:gatlin_barrel")
+            minetest.add_item(pos, "adv_weapons:gatlin_barrel")
             return
         end
         self._dtime = self._dtime + dtime
@@ -135,7 +136,6 @@ minetest.register_entity("adv_weapons:turret_gatlin_barrel", {
 
 -- HACK should use item instead
 minetest.register_node("adv_weapons:gatlin_barrel", {
-    groups = {not_in_creative_inventory = 1},
     description = "Gatlin Barrel",
     drawtype = "mesh",
     mesh = "adv_weapons_gatlin_barrel.obj",
@@ -169,4 +169,4 @@ minetest.register_node("adv_weapons:turret_base", {
     drawtype = "mesh",
     mesh = "adv_weapons_turret_base.obj",
     tiles = {"adv_weapons_grappling_hook_texture.png"}
-})
+})