Update packed fs

test/unit_test.c

@@ -1559,7 +1559,7 @@ static void eh7(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
     struct mg_http_message *hm = (struct mg_http_message *) ev_data;
     struct mg_http_serve_opts sopts;
     memset(&sopts, 0, sizeof(sopts));
-    sopts.root_dir = "";
+    sopts.root_dir = "/";
     sopts.fs = &mg_fs_packed;
     mg_http_serve_dir(c, hm, &sopts);
   }