dsound: Memory allocation sizes fix

[Andrew Talbot]

Changelog:
    dsound: Memory allocation sizes fix.

diff --git a/dlls/dsound/buffer.c b/dlls/dsound/buffer.c
index 108636a..480e8a1 100644
--- a/dlls/dsound/buffer.c
+++ b/dlls/dsound/buffer.c
@@ -154,7 +154,7 @@ static HRESULT IDirectSoundNotifyImpl_Create(
     IDirectSoundNotifyImpl * dsn;
     TRACE("(%p,%p)\n",dsb,pdsn);
 
-    dsn = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(dsn));
+    dsn = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*dsn));
 
     if (dsn == NULL) {
         WARN("out of memory\n");
diff --git a/dlls/dsound/capture.c b/dlls/dsound/capture.c
index a7977d6..f445b4f 100644
--- a/dlls/dsound/capture.c
+++ b/dlls/dsound/capture.c
@@ -748,7 +748,7 @@ static HRESULT IDirectSoundCaptureNotifyImpl_Create(
     IDirectSoundCaptureNotifyImpl * dscn;
     TRACE("(%p,%p)\n",dscb,pdscn);
 
-    dscn = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(dscn));
+    dscn = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*dscn));
 
     if (dscn == NULL) {
 	WARN("out of memory\n");