world: use pointers when passing resources

src/world/sound_world.h

@@ -66,7 +66,7 @@ struct SoundWorld
 	void set_sound_volumes(u32 num, const SoundInstanceId *ids, const f32 *volumes);
 
 	///
-	void reload_sounds(const SoundResource &old_sr, const SoundResource &new_sr);
+	void reload_sounds(const SoundResource *old_sr, const SoundResource *new_sr);
 
 	/// Sets the @a pose of the listener in world space.
 	void set_listener_pose(const Matrix4x4 &pose);

src/world/sound_world_al.cpp

@@ -125,7 +125,7 @@ struct SoundInstance
 		AL_CHECK(alDeleteSources(1, &_source));
 	}
 
-	void reload(const SoundResource &new_sr)
+	void reload(const SoundResource *new_sr)
 	{
 		destroy();
 		create(new_sr, position(), range());
@@ -341,10 +341,10 @@ struct SoundWorldImpl
 		}
 	}
 
-	void reload_sounds(const SoundResource &old_sr, const SoundResource &new_sr)
+	void reload_sounds(const SoundResource *old_sr, const SoundResource *new_sr)
 	{
 		for (u32 i = 0; i < _num_objects; ++i) {
-			if (_playing_sounds[i]._resource == &old_sr) {
+			if (_playing_sounds[i]._resource == old_sr) {
 				_playing_sounds[i].reload(new_sr);
 			}
 		}
@@ -443,7 +443,7 @@ void SoundWorld::set_sound_volumes(u32 num, const SoundInstanceId *ids, const f3
 	_impl->set_sound_volumes(num, ids, volumes);
 }
 
-void SoundWorld::reload_sounds(const SoundResource &old_sr, const SoundResource &new_sr)
+void SoundWorld::reload_sounds(const SoundResource *old_sr, const SoundResource *new_sr)
 {
 	_impl->reload_sounds(old_sr, new_sr);
 }

src/world/sound_world_noop.cpp

@@ -73,8 +73,9 @@ struct SoundWorldImpl
 	{
 	}
 
-	void reload_sounds(const SoundResource & /*old_sr*/, const SoundResource & /*new_sr*/)
+	void reload_sounds(const SoundResource *old_sr, const SoundResource *new_sr)
 	{
+		CE_UNUSED_2(old_sr, new_sr);
 	}
 
 	void set_listener_pose(const Matrix4x4 & /*pose*/)