ChangeLog, fileio.c:

ChangeLog, fileio.c:
  fileio.c (ext2fs_file_read): Factored out common code and cleaned up
  	function.  Fixed a bug where if there was an error reading from the
  	disk, the number of bytes read wasn't reliably set.  (Fixes Debian bug
  	#79163)
  	(ext2fs_file_write): Factored out common code and made function more
  	efficient; if writing a full block, don't bother to do a
  	read-modify-write cycle.