[rygel] examples: Fix standalone server example

[Jens Georg <jensgeorg src gnome org>]

commit d9c9343f8e11137dee0a0425486704ea55c3cbcc
Author: Samuel CUELLA <samuel cuella supinfo com>
Date:   Tue Jan 17 21:06:39 2017 +0100

    examples: Fix standalone server example

 examples/standalone-server.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/examples/standalone-server.c b/examples/standalone-server.c
index 3573081..42abd20 100644
--- a/examples/standalone-server.c
+++ b/examples/standalone-server.c
@@ -127,6 +127,7 @@ int main (int argc, char *argv[])
             rygel_media_object_add_uri (RYGEL_MEDIA_OBJECT (item), uri);
 
             rygel_simple_container_add_child_item (root_container, item);
+            rygel_media_file_item_add_engine_resources (item, NULL, NULL);
         }
 
         i++;