dsound: Disable property sets if hardware doesn't support it

[Maarten Lankhorst]

Property sets shouldn't be created if hardware doesn't have support for it.
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>From d9b3df682b97878a1253ddbaa6ba89ab01a81ada Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <m.b.lankhorst at gmail.com>
Date: Wed, 30 May 2007 19:21:29 +0200
Subject: [PATCH] dsound: Disable property sets if hardware doesn't support it

---
 dlls/dsound/propset.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/dlls/dsound/propset.c b/dlls/dsound/propset.c
index 7773293..7bb7f4f 100644
--- a/dlls/dsound/propset.c
+++ b/dlls/dsound/propset.c
@@ -197,9 +197,19 @@ HRESULT IKsBufferPropertySetImpl_Create(
     IDirectSoundBufferImpl *dsb,
     IKsBufferPropertySetImpl **piks)
 {
+    PIDSDRIVERPROPERTYSET ps = NULL;
     IKsBufferPropertySetImpl *iks;
     TRACE("(%p,%p)\n",dsb,piks);
 
+    if (!dsb->hwbuf)
+        return DSERR_INVALIDPARAM;
+
+    IDsDriver_QueryInterface(dsb->hwbuf, &IID_IDsDriverPropertySet, (void **)&ps);
+    if (!ps)
+        return DSERR_INVALIDPARAM;
+
+    IUnknown_Release(ps);
+
     iks = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(*iks));
     if (iks == 0) {
         WARN("out of memory\n");
-- 
1.4.4.2