IDEIntf: fixed typo

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40124 4005530d-fff6-0310-9dd1-cebe43e6787f
cody: lvlgraph: MarkBackEdges

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40125 4005530d-fff6-0310-9dd1-cebe43e6787f