note 13409 deleted from function.ftruncate by bjori

Note Submitter: jim dot hatfield at insignia dot com ---- ftruncate does not alter the position of the file pointer. If you edit a file in-place by opening for reading and writing, reading the file, truncating and writing out again, you have to seek to the beginning before writing or you get as many NULLs as there were bytes in the original file, then your new content.