Bug in the migration scripts for 6.6.2

@weisswurstkanone In the migration script for version 6.6.2 on https://gist.github.com/weisswurstkanone/a63f733fe58930778f41c695f862724a there is a bug in the script for the recycle bin items.

The $offset += $limit; is one level too far up (within the foreach loop of the items).

This causes 2 main issues.

  1. in case all the files are missing the while loop never stops.
  2. in case the files are there, the offset increases too fast and probably misses out on a lot of recycle bin items.