hsa: fix http response

http_ok is a const null-terminated string, not a vector.

Type: fix
Fixes: 844a36d1a6

Change-Id: Ide1a23506d9f43cd33c3a4b8ba11658c67fbecc8
Signed-off-by: Benoît Ganne <bganne@cisco.com>
diff --git a/src/plugins/hs_apps/http_server.c b/src/plugins/hs_apps/http_server.c
index ace3c75..cc998a6 100644
--- a/src/plugins/hs_apps/http_server.c
+++ b/src/plugins/hs_apps/http_server.c
@@ -429,7 +429,7 @@
   html = format (html, "%v", reply);
   html = format (html, html_footer);
   /* And the http reply */
-  http = format (0, http_ok, vec_len (http_ok));
+  http = format (0, http_ok);
   http = format (http, http_response, vec_len (html), html);
 
   /* Send it */