fix clang++ 4.2 (OSX) compiler warning.


git-svn-id: https://root.cern.ch/svn/root/branches/v5-34-00-patches@48579 27541ba8-7e3a-0410-8455-c3a389f83636
small change needed by ALICE.


git-svn-id: https://root.cern.ch/svn/root/branches/v5-34-00-patches@48580 27541ba8-7e3a-0410-8455-c3a389f83636
make version v5-34-05.


git-svn-id: https://root.cern.ch/svn/root/branches/v5-34-00-patches@48581 27541ba8-7e3a-0410-8455-c3a389f83636