fix some warnings

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46906 4005530d-fff6-0310-9dd1-cebe43e6787f
Suppress VALID warnings until review

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46907 4005530d-fff6-0310-9dd1-cebe43e6787f