bugfix: output is found but spend already exists, so skip insertion instead of continuing to loop. also set found = true so assert doesn't trigger.
bugfix: output is found but spend already exists, so skip insertion instead of continuing to loop. also set found = true so assert doesn't trigger.

kaostao/libbitcoin,Airbitz/libbitcoin,libmetrocoin/libmetrocoin-consensus,GroestlCoin/libgroestlcoin,GroestlCoin/libgroestlcoin,Airbitz/libbitcoin,swansontec/libbitcoin,libmetrocoin/libmetrocoin-consensus,BWallet/libbitcoin,BWallet/libbitcoin,libtetcoin/libtetcoin-consensus,libtetcoin/libtetcoin-consensus,swansontec/libbitcoin,libtetcoin/libtetcoin-consensus,kaostao/libbitcoin,libtetcoin/libtetcoin-consensus,BWallet/libbitcoin,Airbitz/libbitcoin,Airbitz/libbitcoin,libtetcoin/libtetcoin-consensus,BWallet/libbitcoin,GroestlCoin/libgroestlcoin,swansontec/libbitcoin,libmetrocoin/libmetrocoin-consensus,kaostao/libbitcoin,libmetrocoin/libmetrocoin-consensus,swansontec/libbitcoin,GroestlCoin/libgroestlcoin,libmetrocoin/libmetrocoin-consensus,kaostao/libbitcoin