crypt32: Don't crash on freeing null chain engine.

0624ba1b · Juan Lang · Alexandre Julliard · c33f0c55 · 0624ba1b
Commit 0624ba1b authored Sep 20, 2006 by Juan Lang Committed by Alexandre Julliard Sep 21, 2006
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chain.c dlls/crypt32/chain.c +1 -1

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--- a/dlls/crypt32/chain.c
+++ b/dlls/crypt32/chain.c
@@ -163,7 +163,7 @@ void WINAPI CertFreeCertificateChainEngine(HCERTCHAINENGINE hChainEngine)
    TRACE("(%p)\n", hChainEngine);
-    if (InterlockedDecrement(&engine->ref) == 0)
+    if (engine && InterlockedDecrement(&engine->ref) == 0)
    {
        CertCloseStore(engine->hWorld, 0);
        CertCloseStore(engine->hRoot, 0);