Adjust start of action descriptor comparison When looking for blocks with differences, the first character of each block was missed because the value was auto-incremented by the loop. If the first character was the only character in a block that changed, the block wouldn't be flashed, causing a miscomparison during the verify routine. BUG=b:119158699 TEST=Flash grunt image where only the first character of the block is different. BRANCH=None Change-Id: Ifa85e800f727ea2709512a8779532758599f3c31 Signed-off-by: Martin Roth <[email protected]> Reviewed-on: https://chromium-review.googlesource.com/1339659 Commit-Ready: Martin Roth <[email protected]> Tested-by: Kevin Chiu <[email protected]> Tested-by: Martin Roth <[email protected]> Reviewed-by: Vadim Bendebury <[email protected]> Reviewed-by: Kevin Chiu <[email protected]> Reviewed-by: Daniel Kurtz <[email protected]>