rem: g_return_if_fail (bvw != NULL); g_return_if_fail (BACON_IS_VIDEO_WIDGET (bvw)); g_return_if_fail (GST_IS_PLAY (bvw->priv->play));
add: g_return_val_if_fail (bvw != NULL, NULL); g_return_val_if_fail (BACON_IS_VIDEO_WIDGET (bvw), NULL); g_return_val_if_fail (GST_IS_PLAY (bvw->priv->play), NULL);
context: bacon_video_widget_get_visuals_list (BaconVideoWidget * bvw){  GList *pool_registries = NULL, *registries = NULL, *vis_plugins_list = NULL;  GList *plugins = NULL, *features = NULL;  g_return_if_fail (bvw != NULL);  g_return_if_fail (BACON_IS_VIDEO_WIDGET (bvw));  g_return_if_fail (GST_IS_PLAY (bvw->priv->play));  /* Cache */  if (bvw->priv->vis_plugins_list)    {      return bvw->priv->vis_plugins_list;    }  pool_registries = gst_registry_pool_list ();  registries = pool_registries;  while (registries)    {      GstRegistry *registry = GST_REGISTRY (registries->data);      plugins = registry->plugins;      while (plugins)	{	  GstPlugin *plugin = GST_PLUGIN (plugins->data);	  features = gst_plugin_get_feature_list (plugin);	  while (features)	    {	      GstPluginFeature *feature = GST_PLUGIN_FEATURE (features->data);	      if (GST_IS_ELEMENT_FACTORY (feature))		{		  GstElementFactory *factory = GST_ELEMENT_FACTORY (feature);		  if (g_strrstr (factory->details->klass, "Visualization"))		    {		      vis_plugins_list = g_list_append (vis_plugins_list,							(char *)							g_strdup							(GST_OBJECT_NAME							 (factory)));		    }		}	      features = g_list_next (features);	    }	  plugins = g_list_next (plugins);	}      registries = g_list_next (registries);    }  g_list_free (pool_registries);  pool_registries = NULL;  bvw->priv->vis_plugins_list = vis_plugins_list;  return vis_plugins_list;}