[PATCH v2 1/6] amstream: Decrement "sample_refs" only when the object is being released.

[Zebediah Figura]

From: Gijs Vermeulen

Fixes: 51fce87c607d92300bb6b3f7674e7e6c775c86ff
Signed-off-by: Gijs Vermeulen 
Signed-off-by: Zebediah Figura 
---
v2: reword subject to be a bit more specific.

dlls/amstream/ddrawstream.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/dlls/amstream/ddrawstream.c b/dlls/amstream/ddrawstream.c
index 56230ca4e63..b7196d9fc9e 100644
--- a/dlls/amstream/ddrawstream.c
+++ b/dlls/amstream/ddrawstream.c
@@ -980,7 +980,6 @@ HRESULT ddraw_stream_create(IUnknown *outer, void **out)
     object->IMemInputPin_iface.lpVtbl = &ddraw_meminput_vtbl;
     object->IPin_iface.lpVtbl = &ddraw_sink_vtbl;
     object->ref = 1;
-    object->sample_refs = 0;

InitializeCriticalSection(&object->cs);

@@ -1043,12 +1042,12 @@ static ULONG WINAPI ddraw_sample_Release(IDirectDrawStreamSample *iface)

TRACE("(%p)->(): new ref = %u\n", iface, ref);

-    EnterCriticalSection(&sample->parent->cs);
-    InterlockedDecrement(&sample->parent->sample_refs);
-    LeaveCriticalSection(&sample->parent->cs);
-
     if (!ref)
     {
+        EnterCriticalSection(&sample->parent->cs);
+        --sample->parent->sample_refs;
+        LeaveCriticalSection(&sample->parent->cs);
+
         if (sample->surface)
             IDirectDrawSurface_Release(sample->surface);
         HeapFree(GetProcessHeap(), 0, sample);
@@ -1166,7 +1165,7 @@ static HRESULT ddrawstreamsample_create(struct ddraw_stream *parent, IDirectDraw
     object->parent = parent;

EnterCriticalSection(&parent->cs);
-    InterlockedIncrement(&parent->sample_refs);
+    ++parent->sample_refs;
     LeaveCriticalSection(&parent->cs);

if (surface)