Z2WolfHowlMgr, d_bg_s, quat OK (#1887)

include/d/d_demo.h

@@ -8,6 +8,7 @@
 #include "SSystem/SComponent/c_xyz.h"
 #include "dolphin/gx/GXEnum.h"
 #include "dolphin/gx/GXStruct.h"
+#include "Z2AudioLib/Z2SoundStarter.h"
 
 class J3DModel;
 class dDemo_actor_c;
@@ -301,4 +302,8 @@ public:
     static const u8* m_branchData;
 };
 
+inline Z2SoundStarter* Z2GetSoundStarter() {
+    return JASGlobalInstance<Z2SoundStarter>::getInstance();
+}
+
 #endif /* D_D_DEMO_H */