Correct usage of approot

apps/gallery/appinfo/update.php

@@ -7,5 +7,5 @@ if (version_compare($currentVersion, '0.5.0', '<')) {
 	$stmt = OCP\DB::prepare('DROP TABLE IF EXISTS *PREFIX*gallery_albums');
 	$stmt->execute();
 
-	\OC_DB::createDbFromStructure(OC::$APPSROOT.'/apps/'.$appid.'/appinfo/database.xml');
+	\OC_DB::createDbFromStructure(OC_App::getAppPath($appid).'/appinfo/database.xml');
 }