Merge pull request #1155 from bitshares/oxarbitrage-patch-5

fix wrong variable name in vote_for_witness

Author: oxarbitrage

libraries/wallet/wallet.cpp

@@ -1786,7 +1786,7 @@ class wallet_api_impl
    { try {
       account_object voting_account_object = get_account(voting_account);
 
-      fc::optional<witness_object> witness_obj = _remote_db->get_witness_by_account(voting_account);
+      fc::optional<witness_object> witness_obj = _remote_db->get_witness_by_account(witness);
       if (!witness_obj)
          FC_THROW("Account ${witness} is not registered as a witness", ("witness", witness));
       if (approve)