anchordocking: less hints

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41918 4005530d-fff6-0310-9dd1-cebe43e6787f
lazcontrols: fixed crash on invalid type cast, bug 24679, patch by Cyrax

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41919 4005530d-fff6-0310-9dd1-cebe43e6787f