dmsynth: Don't force a calling convention on internal functions.

dlls/dmsynth/dmsynth_main.c

@@ -29,7 +29,7 @@ LONG DMSYNTH_refCount = 0;
 
 typedef struct {
         IClassFactory IClassFactory_iface;
-        HRESULT WINAPI (*fnCreateInstance)(REFIID riid, void **ppv);
+        HRESULT (*fnCreateInstance)(REFIID riid, void **ppv);
 } IClassFactoryImpl;
 
 /******************************************************************

dlls/dmsynth/dmsynth_private.h

@@ -49,8 +49,8 @@ typedef struct IDirectMusicSynthSinkImpl IDirectMusicSynthSinkImpl;
 /*****************************************************************************
  * ClassFactory
  */
-extern HRESULT WINAPI DMUSIC_CreateDirectMusicSynthImpl(REFIID riid, void **ppobj) DECLSPEC_HIDDEN;
-extern HRESULT WINAPI DMUSIC_CreateDirectMusicSynthSinkImpl(REFIID riid, void **ppobj) DECLSPEC_HIDDEN;
+extern HRESULT DMUSIC_CreateDirectMusicSynthImpl(REFIID riid, void **ppobj) DECLSPEC_HIDDEN;
+extern HRESULT DMUSIC_CreateDirectMusicSynthSinkImpl(REFIID riid, void **ppobj) DECLSPEC_HIDDEN;
 
 /*****************************************************************************
  * IDirectMusicSynth8Impl implementation structure

dlls/dmsynth/synth.c

@@ -729,7 +729,7 @@ static const IKsControlVtbl DMSynthImpl_IKsControl_Vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI DMUSIC_CreateDirectMusicSynthImpl(REFIID riid, void **ppobj)
+HRESULT DMUSIC_CreateDirectMusicSynthImpl(REFIID riid, void **ppobj)
 {
     IDirectMusicSynth8Impl *obj;
     HRESULT hr;

dlls/dmsynth/synthsink.c

@@ -298,7 +298,7 @@ static const IKsControlVtbl DMSynthSinkImpl_IKsControl_Vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI DMUSIC_CreateDirectMusicSynthSinkImpl(REFIID riid, void **ret_iface)
+HRESULT DMUSIC_CreateDirectMusicSynthSinkImpl(REFIID riid, void **ret_iface)
 {
     IDirectMusicSynthSinkImpl *obj;
     HRESULT hr;