Broken for multi site installation

At file simplesplash.php, code is broken for multi site instalations.
Below my fix:

function display_splash() {
		$filename = 'splash.php';
		if ( $optionsfile = locate_template( array( $filename ) ) ) {
			 require_once( $optionsfile );
		} elseif ( file_exists( dirname( __FILE__ ) . '/' . $filename ) ) {
			 require_once dirname( __FILE__ ) . '/' . $filename;
		}
/*
		$themepath = get_theme_root().'/'.get_template();
		if(is_file($themepath.'/'.$filename)) {
		  @include($themepath.'/'.$filename);
		}else {
		  @include(dirname(__FILE__).'/'.$filename);
		}
*/
		exit();
	}