lcl: carbon: fixed compilation 2.7.1

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41795 4005530d-fff6-0310-9dd1-cebe43e6787f
cocoa: fix drawing of empty text

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41796 4005530d-fff6-0310-9dd1-cebe43e6787f