update fc with exta variant constructor
update fc with exta variant constructor

dacsunlimited/dac_play,frrp/bitshares,RemitaBit/Remitabit,dacsunlimited/dac_play,drltc/keyid,frrp/bitshares,camponez/bitshares,bitsuperlab/cpp-play,jakeporter/Bitshares,jakeporter/Bitshares,bitsuperlab/cpp-play,bitshares/devshares,bitshares/bitshares-0.x,camponez/bitshares,bitshares/bitshares,bitsuperlab/cpp-play,bitsuperlab/cpp-play,bitsuperlab/cpp-play,FollowMyVote/bitshares,bitshares/bitshares,FollowMyVote/bitshares,bitshares/bitshares,bitshares/bitshares-0.x,denkhaus/bitsharesx,RemitaBit/Remitabit,RemitaBit/Remitabit,dacsunlimited/dac_play,jakeporter/Bitshares,FollowMyVote/bitshares,camponez/bitshares,drltc/keyid,frrp/bitshares,denkhaus/bitsharesx,dacsunlimited/dac_play,FollowMyVote/bitshares,RemitaBit/Remitabit,jakeporter/Bitshares,bitshares/devshares,Ziftr/bitshares,frrp/bitshares,Ziftr/bitshares,denkhaus/bitsharesx,bitshares/bitshares-0.x,jakeporter/Bitshares,dacsunlimited/dac_play,bitshares/bitshares-0.x,frrp/bitshares,camponez/bitshares,denkhaus/bitsharesx,bitshares/devshares,FollowMyVote/bitshares,bitshares/devshares,RemitaBit/Remitabit,frrp/bitshares,RemitaBit/Remitabit,camponez/bitshares,jakeporter/Bitshares,camponez/bitshares,Ziftr/bitshares,dacsunlimited/dac_play,drltc/keyid,bitshares/bitshares,bitshares/bitshares-0.x,bitshares/bitshares,bitshares/bitshares,bitshares/devshares,bitshares/devshares,Ziftr/bitshares,drltc/keyid,bitshares/bitshares-0.x,FollowMyVote/bitshares,bitsuperlab/cpp-play