use the file-wise offset, and not the bmap-wise offset, to lseek(); and some minor tidying
use the file-wise offset, and not the bmap-wise offset, to lseek(); and some minor tidying

pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable