Fix a leak in FilterBlock.
Merge branch 'aql2' of ssh://github.com/triAGENS/ArangoDB into aql2
Merge branch 'aql2' of ssh://github.com/triAGENS/ArangoDB into aql2
Fix a memleak with hash index lookup in AQL.
Merge branch 'aql2' of ssh://github.com/triAGENS/ArangoDB into aql2