Fix job byte reporting -- the digest code runs in verify.c and increases this value.

Fix job byte reporting -- the digest code runs in verify.c and increases this value.
The better solution is to digest the stream as we receive it, thus removing the need to re-read from disk at all, but that requires more extensive and potentially destabilizing changes.

git-svn-id: https://bacula.svn.sourceforge.net/svnroot/bacula/trunk@3786 91ce42f0-d328-0410-95d8-f526ca767f89