Another optimization for the OF in the mi4 format.

What it does:
- removes unnecessary file operations for the OF (one lseek() and one read() per one key),
- simplifies the code and reduces the code size.

Speedup is not noticeable but theoretically some is.

Change-Id: I43a6dd21d3af48ea8d3b27d676c84b2084c0b88c
Reviewed-on: http://gerrit.rockbox.org/287
Tested-by: Szymon Dziok <b0hoon@o2.pl>
Reviewed-by: Thomas Martitz <kugel@rockbox.org>
Reviewed-by: Szymon Dziok <b0hoon@o2.pl>
1 file changed