Resolve references to sections.


git-svn-id: https://root.cern.ch/svn/root/trunk@49310 27541ba8-7e3a-0410-8455-c3a389f83636
Fix warning.


git-svn-id: https://root.cern.ch/svn/root/trunk@49311 27541ba8-7e3a-0410-8455-c3a389f83636