Thrift: Kill a warning.

Summary:
These should always have been const.

Reviewed By: mcslee

Test Plan:
Re-ran the dense protocol test.

Revert Plan: ok


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665303 13f79535-47bb-0310-9956-ffa450edef68
2 files changed