Thrift: OCaml library binary protocol fix

Summary: Binary protocol wasn't dealing with messages properly. Also
there was a math bug in readI32.
Reviewed by: mcslee
Test plan: Yes
Revert plan: yes


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665171 13f79535-47bb-0310-9956-ffa450edef68
2 files changed