IDE: less warnings

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42129 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: Initialize return value for "Enclose in $IFDEF". Issue #24713, patch from Joachim Förster.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42130 4005530d-fff6-0310-9dd1-cebe43e6787f