In Item_param::set_from_user_var
value.cs_info.character_set_client is set
to 'fromcs' value. It's wrong, it should be set to
thd->variables.character_set_client.



mysql-test/r/ctype_gbk_binlog.result:
  test result
mysql-test/t/ctype_gbk_binlog.test:
  test case
sql/item.cc:
  In Item_param::set_from_user_var
  value.cs_info.character_set_client is set
  to 'fromcs' value. It's wrong, it should be set to
  thd->variables.character_set_client.