Thrift: TMemoryBuffer now handles NULLs again.

Summary:
Boz is using TMemoryBuffer by constructing it will a NULL buffer,
then doing a resetBuffer later.  This patch re-enables that.

Blame Rev: 55988

Reviewed By: aditya

Test Plan:
Thrift compiles.
Will test feed after this is comitted.

Revert Plan: ok


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665216 13f79535-47bb-0310-9956-ffa450edef68
2 files changed