Add missing initialization of wildcard_policy's 'next' field.
diff --git a/test/srtp_driver.c b/test/srtp_driver.c
index ba6c646..e99c769 100644
--- a/test/srtp_driver.c
+++ b/test/srtp_driver.c
@@ -1531,5 +1531,6 @@
     sec_serv_conf_and_auth  /* security services flag      */
   },
   test_key,
+  NULL,
   NULL
 };