Change the way the lua engine initialization functions are called

luprex/cpp/core/source.hpp

@@ -127,6 +127,7 @@
 class SourceDB : public eng::nevernew  {
 private:
     lua_State *lua_state_;
+    static void register_lua_builtins();
 
 public:
     void init(lua_State *L);
@@ -188,10 +189,6 @@ public:
     void set(const eng::string &fn, const eng::string &code, int sequence);
     eng::string get(const eng::string &fn);
 
-    // Add builtins to the global function registry.
-    //
-    static void register_lua_builtins();
-    
     // Get function documentation.
     //
     // Returns false if it has no documentation for the specified function.