Prevent deref of invalid optional on wallet import of malformed WIF key
Prevent deref of invalid optional on wallet import of malformed WIF key

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