update Assets container - template-based now

src/logic/scripting/lua/libaudio.cpp

@@ -32,7 +32,7 @@ inline audio::speakerid_t play_sound(
         return 0;
     }
     auto assets = scripting::engine->getAssets();
-    auto sound = assets->getSound(name);
+    auto sound = assets->get<audio::Sound>(name);
     if (sound == nullptr) {
         return 0;
     }