add TTCheck in File Table For UPDATE-Script

this Fild shows the last date which this colum was checked

DB/shema.sql

@@ -7,7 +7,8 @@ CREATE TABLE File (
 	MD5 VARCHAR(32),
 	FT_ID INTEGER DEFAULT 0,
 	Size INTEGER,							-- KB (max 2TB anggebbar)
-	TTSync INTEGER DEFAULT 0
+	TTSync INTEGER DEFAULT 0,
+	TTCheck DATETIME DEFAULT NULL
  );
 
 CREATE TABLE VideoFile (