ole32/tests: Fix a structure size check for Win64.

dlls/ole32/tests/moniker.c

diff --git a/dlls/ole32/tests/moniker.c b/dlls/ole32/tests/moniker.c
index 1b7bcc3..b959e74 100644
--- a/dlls/ole32/tests/moniker.c
+++ b/dlls/ole32/tests/moniker.c
@@ -1750,7 +1750,7 @@
     hr = IBindCtx_GetBindOptions(pBindCtx, (BIND_OPTS *)&bind_opts);
     ok_ole_success(hr, "IBindCtx_GetBindOptions");
     ok(bind_opts.cbStruct == sizeof(bind_opts) ||
-       bind_opts.cbStruct == 36, /* Vista */
+       bind_opts.cbStruct == sizeof(bind_opts) + sizeof(void*), /* Vista */
        "bind_opts.cbStruct was %d\n", bind_opts.cbStruct);
 
     bind_opts.cbStruct = sizeof(BIND_OPTS);