Make sure to lazily initialize $TSPEC for structs even with no members

Reviewed By: dweatherford

Test Plan: Generate code with no E_ALL for method-less args


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665346 13f79535-47bb-0310-9956-ffa450edef68
1 file changed