wp_theme_update_rows()

function wp_theme_update_rows() {
	if ( !current_user_can('update_themes' ) )
		return;

	$themes = get_site_transient( 'update_themes' );
	if ( isset($themes->response) && is_array($themes->response) ) {
		$themes = array_keys( $themes->response );

		foreach ( $themes as $theme ) {
			add_action( "after_theme_row_$theme", 'wp_theme_update_row', 10, 2 );
		}
	}
}