Qt: fixed crash with fpc-2.6.4


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44315 4005530d-fff6-0310-9dd1-cebe43e6787f
carbon: fixed crash with overrided InsertItem() with fpc > 2.6.2


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44316 4005530d-fff6-0310-9dd1-cebe43e6787f