quartz: Avoid releasing NULL objects.

d51098ef · Chris Robinson · Alexandre Julliard · 425d8746 · d51098ef
Commit d51098ef authored Apr 04, 2007 by Chris Robinson Committed by Alexandre Julliard Apr 06, 2007
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filtergraph.c dlls/quartz/filtergraph.c +4 -1

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--- a/dlls/quartz/filtergraph.c
+++ b/dlls/quartz/filtergraph.c
@@ -274,7 +274,10 @@ static ULONG Filtergraph_Release(IFilterGraphImpl *This) {
            IBaseFilter_Release(This->ppFiltersInGraph[i]);
        }
        for (i = 0; i < This->nItfCacheEntries; i++)
-            IUnknown_Release(This->ItfCacheEntries[i].iface);
+        {
+            if (This->ItfCacheEntries[i].iface)
+                IUnknown_Release(This->ItfCacheEntries[i].iface);
+        }
 	IFilterMapper2_Release(This->pFilterMapper2);
 	CloseHandle(This->hEventCompletion);
 	EventsQueue_Destroy(&This->evqueue);