Bug#694590: Image created with live-build fails to perform integrity-check

[Peter Ryzhenkov <peter.ryzhenkov@gmail.com>]

Package: live-build
Version: 3.0~a51-1

Steps to reproduce:
1. Create image with live-build
2. Add integrity-check to boot params
3. Boot it

Integrity check should be performed, but this step is skipped.
This probably happens because of addition of the first 6 lines of description
to the SHA256SUMS file.

The problem affects the official live builds also,
tested it on debian-wheezy-live-a2-i386-kde-desktop.iso

Integrity check is very important for us all, I think it should be corrected.

Thanks in advance,
Peter Ryzhenkov.