toggleable lua support during build

simulationstateserializer.cpp

@@ -319,7 +319,11 @@ void state_serializer::deserialize_lua( cParser &Input, scene::scratch_data &Scr
        Input.getTokens(1, false);
        std::string file;
        Input >> file;
+#ifdef WITH_LUA
        simulation::Lua.interpret(Global.asCurrentSceneryPath + file);
+#else
+       ErrorLog(file + ": lua scripts not supported in this build.");
+#endif
 }
 
 void