Fix possible failure in wallet::add_contact_account
Fix possible failure in wallet::add_contact_account

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