[dmime] AddPort's pPort can be NULL

[Peter Berg Larsen]

Changelog:
 	pPort can be NULL, meaning default port. If so, dont try and
 	AddRef the NULL.


Index: dlls/dmime/performance.c
===================================================================
RCS file: /home/wine/wine/dlls/dmime/performance.c,v
retrieving revision 1.26
diff -p -u -r1.26 performance.c
--- dlls/dmime/performance.c	21 Jun 2005 09:44:28 -0000	1.26
+++ dlls/dmime/performance.c	17 Oct 2005 22:48:42 -0000
@@ -511,7 +511,10 @@ static HRESULT WINAPI IDirectMusicPerfor
  static HRESULT WINAPI IDirectMusicPerformance8Impl_AddPort (LPDIRECTMUSICPERFORMANCE8 iface, IDirectMusicPort* pPort) {
  	IDirectMusicPerformance8Impl *This = (IDirectMusicPerformance8Impl *)iface;
  	FIXME("(%p, %p): stub\n", This, pPort);
-	IDirectMusicPort_AddRef (pPort);
+	if (pPort == NULL) {
+		FIXME("Default port selected, but not implemented\n");
+	} else
+		IDirectMusicPort_AddRef (pPort);
  	return S_OK;
  }