witness.cpp:  Explicitly specify skip_flags
witness.cpp:  Explicitly specify skip_flags

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