libtracker-miner: cater for unbound nfo:belongsToContainer when moving items
Fixes warnings when moving indexing roots around. This query expects this property to be bound, resulting in no-op if that's not the case (e.g. indexing roots), later reinsertions of nie:url and other properties with max cardinality=1 trigger the whole update failure, because those weren't properly removed.
Showing with 3 additions and 3 deletions