printer migration failures

[tridge at samba.org]

Hi Gunther,

While testing s3compat I ran across errors in the printer
migration code. For example, I had a SECDESC record with no
corresponding printer, and in another new install I had no printers
tdb.

Can you please look at the following patch to fix these problems:

  http://git.samba.org/?p=tridge/samba.git;a=commitdiff;h=e9580bd0d74f6df8631b22b458b5cebd5e274813;hp=5c34ea673b3a1814a0dfef07fbcbfc55fc8be9fc

Cheers, Tridge