Attach service discovery objects to the playlist (and remove a bunch of trailing spaces).

src/playlist/services_discovery.c

@@ -72,6 +72,7 @@ services_discovery_Create ( vlc_object_t * p_super, const char * psz_module_name
     p_sd->psz_module = strdup( psz_module_name );
     p_sd->b_die = VLC_FALSE; /* FIXME */
 
+    vlc_object_attach( p_sd, p_super );
     return p_sd;
 }
 
@@ -85,6 +86,7 @@ void services_discovery_Destroy ( services_discovery_t * p_sd )
     free( p_sd->psz_module );
     free( p_sd->psz_localized_name );
 
+    vlc_object_detach( p_sd );
     vlc_object_destroy( p_sd );
 }