fix crash on scanning
fix crash on scanning

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