Since cling::Transaction is public and the fact that on commit of transaction a

new transaction could be triggered, every compile should return the transaction
that it actually compiled. I.e. the cling::IncrementalParser::getLastTransaction
in many cases might not be the transaction we expect. For example in ROOT's case
plugin manager is triggered for some reason and the last transaction is not the
one that I'd personally expect.
This should be fix roottest/.../runMemory.C


git-svn-id: http://root.cern.ch/svn/root/trunk@47465 27541ba8-7e3a-0410-8455-c3a389f83636