In acl_getroot_no_password(), use a separate variable for traversing the acl_users list so that the last entry is not used when no matching entries are found.


mysql-test/r/view_grant.result:
  Fixed the testcase for bug #14875 which relied on broken behavior. sctx->master_access and sctx->priv_user were being set to the last entry in the acl_users list. That does not happen after the patch for bug #28895, so we get a different warning message.
sql/sql_acl.cc:
  In acl_getroot_no_password(), use a separate variable for traversing the acl_users list so that the last entry is not used when no matching entries are found.