Deleting an instance should delete it from the blocks table

Currently, deleting an instance does not also delete it from the blocks table. This leaves orphan records in the blocks table. It would be ideal if the behavior is changed to work like custom blocks (which deletes all instance-associated records in both the blocks_custom table and the blocks table). I believe only the following needs to be added to the multiblock_delete function in multiblock.module:

  db_delete('block')
    ->condition('module', 'multiblock')
    ->condition('delta', (int) $multiblock_delta)
    ->execute();
  db_delete('block_role')
    ->condition('module', 'multiblock')
    ->condition('delta', (int) $multiblock_delta)
    ->execute();

I will try roll patch.