wintrust: Don't fail if a registry value doesn't exist.

dlls/wintrust/tests/register.c

@@ -332,9 +332,9 @@ static void test_RegPolicyFlags(void)
 
     size = sizeof(flags1);
     r = RegQueryValueExA(key, State, NULL, NULL, (LPBYTE)&flags1, &size);
-    ok(!r, "RegQueryValueEx failed: %d\n", r);
-
-    ok(flags1 == flags2, "Got %08x flags instead of %08x\n", flags1, flags2);
+    ok(!r || r == ERROR_FILE_NOT_FOUND, "RegQueryValueEx failed: %d\n", r);
+    if (r)
+        ok(flags1 == flags2, "Got %08x flags instead of %08x\n", flags1, flags2);
 
     flags3 = flags2 | 1;
     ret = pWintrustSetRegPolicyFlags(flags3);