dmusic: Move IDirectMusicDownloadImpl struct to where it is used.

dlls/dmusic/dmusic_private.h

@@ -47,7 +47,6 @@
 typedef struct IDirectMusic8Impl IDirectMusic8Impl;
 typedef struct IDirectMusicBufferImpl IDirectMusicBufferImpl;
 typedef struct IDirectMusicDownloadedInstrumentImpl IDirectMusicDownloadedInstrumentImpl;
-typedef struct IDirectMusicDownloadImpl IDirectMusicDownloadImpl;
 typedef struct IReferenceClockImpl IReferenceClockImpl;
 
 typedef struct IDirectMusicInstrumentImpl IDirectMusicInstrumentImpl;
@@ -145,17 +144,6 @@ struct IDirectMusicDownloadedInstrumentImpl {
     void *data;
 };
 
-/*****************************************************************************
- * IDirectMusicDownloadImpl implementation structure
- */
-struct IDirectMusicDownloadImpl {
-    /* IUnknown fields */
-    IDirectMusicDownload IDirectMusicDownload_iface;
-    LONG ref;
-
-    /* IDirectMusicDownloadImpl fields */
-};
-
 /** Internal factory */
 extern HRESULT synth_port_create(IDirectMusic8Impl *parent, DMUS_PORTPARAMS *port_params,
         DMUS_PORTCAPS *port_caps, IDirectMusicPort **port);

dlls/dmusic/download.c

@@ -23,6 +23,14 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(dmusic);
 
+struct IDirectMusicDownloadImpl
+{
+    IDirectMusicDownload IDirectMusicDownload_iface;
+    LONG ref;
+};
+
+typedef struct IDirectMusicDownloadImpl IDirectMusicDownloadImpl;
+
 static inline IDirectMusicDownloadImpl* impl_from_IDirectMusicDownload(IDirectMusicDownload *iface)
 {
     return CONTAINING_RECORD(iface, IDirectMusicDownloadImpl, IDirectMusicDownload_iface);