LazUtils: fix for TFreeTypeFont.SetPointSize. Patch from circular

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40427 4005530d-fff6-0310-9dd1-cebe43e6787f
LazUtils: improvements for TTInterp. Patch from circular

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40428 4005530d-fff6-0310-9dd1-cebe43e6787f
LazUtils: improvements for ttfile.pas. Patch from circular

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40429 4005530d-fff6-0310-9dd1-cebe43e6787f