object_database.cpp:  Don't crash when a bogus type_id is passed
object_database.cpp:  Don't crash when a bogus type_id is passed

oxarbitrage/bitshares-core,bigoc/openchain,cryptonomex/graphene,abitmore/bitshares-2,pmconrad/graphene,abitmore/bitshares-2,bigoc/openchain,bitshares/bitshares-2,cryptonomex/graphene,abitmore/bitshares-2,abitmore/bitshares-2,bitshares/bitshares-2,bigoc/openchain,bitsuperlab/cpp-play2,oxarbitrage/bitshares-core,bitshares/bitshares-2,pmconrad/graphene,bitshares/bitshares-2,peertracksinc/muse,bitsuperlab/cpp-play2,pmconrad/graphene,oxarbitrage/bitshares-core,oxarbitrage/bitshares-core,peertracksinc/muse,cryptonomex/graphene,bigoc/openchain,peertracksinc/muse,bitsuperlab/cpp-play2,pmconrad/graphene,peertracksinc/muse