Added stub for CertFreeCertificateContext.

diff --git a/dlls/crypt32/crypt32.spec b/dlls/crypt32/crypt32.spec
index 98aa8e4..edae755 100644
--- a/dlls/crypt32/crypt32.spec
+++ b/dlls/crypt32/crypt32.spec
@@ -42,7 +42,7 @@
 @ stub CertFreeCTLContext
 @ stub CertFreeCertificateChain
 @ stub CertFreeCertificateChainEngine
-@ stub CertFreeCertificateContext
+@ stdcall CertFreeCertificateContext(ptr)
 @ stub CertGetCRLContextProperty
 @ stub CertGetCRLFromStore
 @ stub CertGetCTLContextProperty
diff --git a/dlls/crypt32/main.c b/dlls/crypt32/main.c
index 19bd296..0488ba1 100644
--- a/dlls/crypt32/main.c
+++ b/dlls/crypt32/main.c
@@ -293,3 +293,9 @@
     FIXME("%p %08lx\n", hCertStore, dwFlags );
     return TRUE;
 }
+
+BOOL WINAPI CertFreeCertificateContext( PCCERT_CONTEXT pCertContext )
+{
+    FIXME("%p stub\n", pCertContext);
+    return TRUE;
+}